advantages of shorthand assignment operator in c

Assignment and shorthand assignment operator in C

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Shorthand assignment

Assignment operator is used to assign value to a variable (memory location). There is a single assignment operator = in C. It evaluates expression on right side of = symbol and assigns evaluated value to left side the variable.

For example consider the below assignment table.

Operation	Description
	Assigns 10 to variable
	Evaluates expression and assign result to
	Evaluates and assign result to
	Error, you cannot re-assign a value to a constant
	Error, you cannot re-assign a value to a constant

The RHS of assignment operator must be a constant, expression or variable. Whereas LHS must be a variable (valid memory location).

Shorthand assignment operator

C supports a short variant of assignment operator called compound assignment or shorthand assignment. Shorthand assignment operator combines one of the arithmetic or bitwise operators with assignment operator.

For example, consider following C statements.

The above expression a = a + 2 is equivalent to a += 2 .

Similarly, there are many shorthand assignment operators. Below is a list of shorthand assignment operators in C.

Shorthand assignment operator	Example	Meaning

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Assignment Operators in Programming

Assignment operators in programming are symbols used to assign values to variables. They offer shorthand notations for performing arithmetic operations and updating variable values in a single step. These operators are fundamental in most programming languages and help streamline code while improving readability.

Table of Content

What are Assignment Operators?

Types of Assignment Operators
Assignment Operators in C
Assignment Operators in C++
Assignment Operators in Java
Assignment Operators in Python
Assignment Operators in C#
Assignment Operators in Javascript
Application of Assignment Operators

Assignment operators are used in programming to assign values to variables. We use an assignment operator to store and update data within a program. They enable programmers to store data in variables and manipulate that data. The most common assignment operator is the equals sign ( = ), which assigns the value on the right side of the operator to the variable on the left side.

Types of Assignment Operators:

Simple Assignment Operator ( = )
Addition Assignment Operator ( += )
Subtraction Assignment Operator ( -= )
Multiplication Assignment Operator ( *= )
Division Assignment Operator ( /= )
Modulus Assignment Operator ( %= )

Below is a table summarizing common assignment operators along with their symbols, description, and examples:

Operator	Description	Examples
= (Assignment)	Assigns the value on the right to the variable on the left.	assigns the value 10 to the variable x.
+= (Addition Assignment)	Adds the value on the right to the current value of the variable on the left and assigns the result to the variable.	is equivalent to
-= (Subtraction Assignment)	Subtracts the value on the right from the current value of the variable on the left and assigns the result to the variable.	is equivalent to
*= (Multiplication Assignment)	Multiplies the current value of the variable on the left by the value on the right and assigns the result to the variable.	is equivalent to
/= (Division Assignment)	Divides the current value of the variable on the left by the value on the right and assigns the result to the variable.	is equivalent to
%= (Modulo Assignment)	Calculates the modulo of the current value of the variable on the left and the value on the right, then assigns the result to the variable.	is equivalent to

Assignment Operators in C:

Here are the implementation of Assignment Operator in C language:

Assignment Operators in C++:

Here are the implementation of Assignment Operator in C++ language:

Assignment Operators in Java:

Here are the implementation of Assignment Operator in java language:

Assignment Operators in Python:

Here are the implementation of Assignment Operator in python language:

Assignment Operators in C#:

Here are the implementation of Assignment Operator in C# language:

Assignment Operators in Javascript:

Here are the implementation of Assignment Operator in javascript language:

Application of Assignment Operators:

Variable Initialization : Setting initial values to variables during declaration.
Mathematical Operations : Combining arithmetic operations with assignment to update variable values.
Loop Control : Updating loop variables to control loop iterations.
Conditional Statements : Assigning different values based on conditions in conditional statements.
Function Return Values : Storing the return values of functions in variables.
Data Manipulation : Assigning values received from user input or retrieved from databases to variables.

Conclusion:

In conclusion, assignment operators in programming are essential tools for assigning values to variables and performing operations in a concise and efficient manner. They allow programmers to manipulate data and control the flow of their programs effectively. Understanding and using assignment operators correctly is fundamental to writing clear, efficient, and maintainable code in various programming languages.

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Arithmetical Assignment Operators in C

In the realm of programming, effectiveness and clarity play pivotal roles. To streamline code and make it more concise, programmers often utilize assignment operators. Among these, arithmetical assignment operators hold a special place. They combine arithmetic operations with assignments, allowing for efficient and cleaner code. In this piece, we will delve into the realm of arithmetical assignment operators within the context of C programming. We will uncover their purpose, how to use them effectively, and the advantages they bring, all while offering simplified examples catered to beginners, ensuring a seamless learning experience.

Understanding Arithmetical Assignment Operators

Arithmetical assignment operators are shorthand notations that perform arithmetic operations and assignments in a single step.

These operators include:

+= (Add and Assign)
-= (Subtract and Assign)
*= (Multiply and Assign)
/= (Divide and Assign)
%= (Modulus and Assign)

For instance, using +=, you can add a value to a variable without needing a separate assignment statement. Similarly, the other operators work by performing the respective operation and updating the variable’s value directly.

Operator	Operation	Example
+	Addition	X + Y = 42
–	Subtraction	X – Y = -18
*	Multiplication	X * Y = 315
/	Division	Y / X = 7
%	Modulus (Remainder)	Y % X = 0
++	Increment (Increase by One)	X++ = 8
—	Decrement (Decrease by One)	X– = 6

Operator name	Operator	Description	Equivalent	Example
Basic assignment	=	Assign the value of n to m	N/A	m = n
Addition assignment	+=	Adds the value of n to m and assigns the result to m	m = m + n	m += n
Subtraction assignment	-=	Subtracts the value of n from m and assigns the result to m	m = m – n	m -= n
Multiplication assignment	*=	Multiplies the value of m by n and assigns the result to m	m = m * n	m *= n
Division assignment	/=	Divide the value of m by n and assign the result to m	m = m / n	m /= n
Modulo assignment	%=	Calculates the remainder of m divided by n and assigns it to m	m = m % n	m %= n

Usage of Arithmetical Assignment Operators

The primary advantage of using arithmetical assignment operators is code simplicity. They reduce the need for separate lines of code for arithmetic operations and assignments. This improves code readability while lowering the likelihood of mistakes brought on by forgotten assignments.

Consider this example:

// Without arithmetical assignment operator x = x + 5;

// With arithmetical assignment operator x += 5;

The second approach is not only shorter but also more intuitive, as it directly communicates the intent.

Let’s explore arithmetical assignment operators through some examples:

Output: The number of apples left after eating is 13.

Subtraction:

Output: Total is now 80.

Multiplication:

Output: quantity is now 12.

Output: value is now 25.0.

Output: dividend is now 2.

Original total amount: 100 After adding incremental: 125 After subtracting incrementValue: 100 After multiplying by incrementValue: 2500 After dividing by incrementValue: 100 After getting remainder by incrementValue: 0

These examples show how, depending on the operation, the arithmetical assignment operators change the value of the variable they are applied to.

Common Mistakes and Pitfalls

While arithmetical assignment operators can simplify code, beginners should be cautious about data types. Mixing incompatible data types can lead to unexpected results. Also, remember that the order of operations still matters.

Performance Considerations

In addition to improving code readability, using arithmetical assignment operators can improve efficiency.These operators can be efficiently optimised by contemporary compilers, which lowers memory and computation overhead.

Arithmetical assignment operators are a powerful tool in a programmer’s arsenal. By combining arithmetic operations and assignments, they make code more elegant and efficient. From novice programmers to seasoned developers, anyone can benefit from incorporating these operators into their coding practices. So go ahead, simplify your code and make your programming journey smoother with arithmetical assignment operators in C.

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C Programming Language: shorthand

Shorthand in C is extremely simple. Any time you are assigning a value of a variable that uses that variable in the assignment you can simplify the syntax. For example:

This line of code adds 32 to the current value of ‘myVar’. But you don’t need to type ‘myVar’ twice. Instead, move the operator (that’s the plus sign in this case) to the left side of the assignment operator (the equals sign). The portion of code originally on right side of the operator will be the only thing still remaining on the right side of the assignment operator in our shortened code snippet:

This will work for any type of operator, and for any complexity of assignment as long as you can get the variable alone on the left side of the argument.

If you want to use a bitwise operator on a variable:

It can be used by the shifting operators as well:

If you weren’t already familiar with this, it should make it much easier to read other developers’ code since shorthand is almost always used when it can be. It will also increase your coding speed, and decrease you hand and wrist pain!

Shorthand Operator in C

Shorthand Operator in C – C has a special operator called shorthand that simplifies coding a certain type of assignment statements.

Example for Shorthand Operator in C

a = a+2; can be written as: a += 2;

The operator += tells the compiler that a is assigned the value of a + 2;

This shorthand works for all binary operators in C.

The general form is variable operator = variable / constant / expression

These operators are listed below:



+=	x += 2	x = x+2
-=	x -= 2	x = x-2
*=	x *= 2	x = x*2
/=	x /= 2	x = x/2
%=	x %= 2	x = x%2
&&=	x &&= y	x = x&&y
\|\|=	x \|\|= y	x = x\|\|y

C Assignment Operators

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An assignment operation assigns the value of the right-hand operand to the storage location named by the left-hand operand. Therefore, the left-hand operand of an assignment operation must be a modifiable l-value. After the assignment, an assignment expression has the value of the left operand but isn't an l-value.

assignment-expression : conditional-expression unary-expression assignment-operator assignment-expression

assignment-operator : one of = *= /= %= += -= <<= >>= &= ^= |=

The assignment operators in C can both transform and assign values in a single operation. C provides the following assignment operators:

Operator	Operation Performed
	Simple assignment
	Multiplication assignment
	Division assignment
	Remainder assignment
	Addition assignment
	Subtraction assignment
	Left-shift assignment
	Right-shift assignment
	Bitwise-AND assignment
	Bitwise-exclusive-OR assignment
	Bitwise-inclusive-OR assignment

In assignment, the type of the right-hand value is converted to the type of the left-hand value, and the value is stored in the left operand after the assignment has taken place. The left operand must not be an array, a function, or a constant. The specific conversion path, which depends on the two types, is outlined in detail in Type Conversions .

Assignment Operators

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Assignment Operators in C

Assignment operators are used to assigning the result of an expression to a variable. Up to now, we have used the shorthand assignment operator “=”, which assigns the result of a right-hand expression to the left-hand variable. For example, in the expression x = y + z, the sum of y and z is assigned to x.

Another form of assignment operator is variable operator_symbol= expression ; which is equivalent to variable = variable operator_symbol expression;

We have the following different types of assignment and assignment short-hand operators.

Expression with an assignment operator	Detailed expression with an assignment operator
x += y;	x = x + y;
x -= y;	x = x – y;
x /= y;	x = x / y;
x *= y;	x = x * y;
x %= y;	x = x % y;
x &= y;	x = x & y;
x \|= y;	x = x \| y;
x ^= y;	x = x ^ y;
x >>= y;	x = x >> y;
x <<= y;	x = x << y;

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What is an assignment operator in c.

Assignment Operators in C are used to assign values to the variables. They come under the category of binary operators as they require two operands to operate upon. The left side operand is called a variable and the right side operand is the value. The value on the right side of the "=" is assigned to the variable on the left side of "=". The value on the right side must be of the same data type as the variable on the left side. Hence, the associativity is from right to left.

In this C tutorial , we'll understand the types of C programming assignment operators with examples. To delve deeper you can enroll in our C Programming Course .

Before going in-depth about assignment operators you must know about operators in C. If you haven't visited the Operators in C tutorial, refer to Operators in C: Types of Operators .

Types of Assignment Operators in C

There are two types of assignment operators in C:


+=	addition assignment	It adds the right operand to the left operand and assigns the result to the left operand.
-=	subtraction assignment	It subtracts the right operand from the left operand and assigns the result to the left operand.
*=	multiplication assignment	It multiplies the right operand with the left operand and assigns the result to the left operand
/=	division assignment	It divides the left operand with the right operand and assigns the result to the left operand.
%=	modulo assignment	It takes modulus using two operands and assigns the result to the left operand.

Example of Augmented Arithmetic and Assignment Operators

There can be five combinations of bitwise operators with the assignment operator, "=". Let's look at them one by one.


&=	bitwise AND assignment	It performs the bitwise AND operation on the variable with the value on the right
\|=	bitwise OR assignment	It performs the bitwise OR operation on the variable with the value on the right
^=	bitwise XOR assignment	It performs the bitwise XOR operation on the variable with the value on the right
<<=	bitwise left shift assignment	Shifts the bits of the variable to the left by the value on the right
>>=	bitwise right shift assignment	Shifts the bits of the variable to the right by the value on the right

Example of Augmented Bitwise and Assignment Operators

Practice problems on assignment operators in c, 1. what will the value of "x" be after the execution of the following code.

The correct answer is 52. x starts at 50, increases by 5 to 55, then decreases by 3 to 52.

2. After executing the following code, what is the value of the number variable?

The correct answer is 144. After right-shifting 73 (binary 1001001) by one and then left-shifting the result by two, the value becomes 144 (binary 10010000).

Benefits of Using Assignment Operators

Simplifies Code: For example, x += 1 is shorter and clearer than x = x + 1.
Reduces Errors: They break complex expressions into simpler, more manageable parts thus reducing errors.
Improves Readability: They make the code easier to read and understand by succinctly expressing common operations.
Enhances Performance: They often operate in place, potentially reducing the need for additional memory or temporary variables.

Best Practices and Tips for Using the Assignment Operator

While performing arithmetic operations with the same variable, use compound assignment operators

Initialize Variables When Declaring int count = 0 ; // Initialization
Avoid Complex Expressions in Assignments a = (b + c) * (d - e); // Consider breaking it down: int temp = b + c; a = temp * (d - e);
Avoid Multiple Assignments in a Single Statement // Instead of this a = b = c = 0 ; // Do this a = 0 ; b = 0 ; c = 0 ;
Consistent Formatting int result = 0 ; result += 10 ;

When mixing assignments with other operations, use parentheses to ensure the correct order of evaluation.

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Operators in C

Here we will discuss operators in the C language. What are unary, binary, and ternary operators? How many types of operations are performed in the C language? We will learn these concepts in detail.

Based on the number of operands participating in the operation, operators are divided into 3 types in the C language.

Arithmetic Operators

Arithmetic operators are used to performing mathematical operations. The arithmetic operators can operate on any built-in data type.

Syntax:- operand1 operator operand2


	Addition
	Substraction
	Multiplacation
	Division
	Modulus (remainder after integer division)

a) Integer mode arithmetic

When arithmetic operators operates on integers then it is called integer mode arithmetic. It always yields an integer value.

integer operator integer = integer

Examples:- 1+3 = 4 ‘A’ + 1 = 66 ‘a’ + ‘b’ = 195 3 * 2 = 6 8 / 2 = 4 9 % 2 = 1

b) Real mode arithmetic

real operator real = real

c) Mixed mode arithmetic

integer operator real = real real operator integer = real

Examples:- 4.0 + 5 = 9.0 9.0 – 4 = 5.0 3.0 * 2.0 = 6.0 5.0 / 2 = 2.5 5.0 % 2 = Error

C Program to see a demonstration of Arithmetic operators

Sum = 14 Substraction = 4 Multiplaction = 45 Division = 1 Modulus = 4

Some special points for arithmetic operators in c

A) subtraction operator (-).

The unary minus operator has the effect of multiplying its operand by -1. Example:- 8 x (-1) = (-8)

b) Division Operators (/)

The division operator (/) produces the quotient. The second operand should be a non-zero number. So, n using division operator (/), if exactly any one of the operand is negative then the result is negative. If both operands are -ve/+ve then result is positive.

Any integer number divided by ten removes the last digit of the number. In next coming many examples we will use this concept to solve the big problems.

c) Modulus Operators (%)

The remainder operator or modulus operator (%) produces the remainder after integer division i.e x%y = x – (x/y)*y . The operands for modulus operator (%) should be of type integer and the second operand should be a non-zero value. The modulus operator (%) does not operate on floats and doubles. On using modulus operator(%) the sign of the remainder is always same as the sign of the numerator.

Any number%10 always gives last digits of number. After some times in big problem you need to find last digit of the number the apply % operator on number.

Assignment operator

Assignment operators are used to assign the result of an expression to a variable.

Above statements are called assignment statements or assignment expressions. In an assignment statement, the right-side expression to the assignment operator is evaluated first and the obtained result is stored inside the left side variable to that assignment operator. So, we can say that it copies the value on its right side into the left side variable.

The left side operand of the assignment should be a variable. C does not allow any expression or constant to be placed to the left of the assignment operator. a+b=c; // invalid, left side operand should be a variable 10 = 20; // invalid

Compound assignment operators

C supports a set of shorthand assignment operators. Following are the advantages of using shorthand assignment operators:


+=	x+=a;	x=x+a;
-=	x-=a;	x=x-a;
*=	x*=a;	x=x*a;
/=	x/=a;	x=x/a;
%=	x%=a;	x=x%a;
&=	x&=a;	x=x&a;
\|=	x\|=a;	x=x\|a;
^=	x^=a;	x=x^a;
<<=	x<<=a;	x=x<<a;
>>=	x>>=a;	x=x>>a;

Relational Operator

Relational operator are used to check given condition or expression is true or false. Combination of some operands and constants with relational operators is called a relational expression.

Syntax:- operand1 relational-operator operand2

If the relation is true then the value of the relational expression is 1 and if the relation is false then the value of the expression is 0. In C language (with relational operator), every non-zero value is 1 i.e. true.


	Is less than	5<2 = 0 ; 5<10 = 1
	Is less than or equal to	5<=2 = 0; 5<=5 = 1
	Is greater than	5>2 = 1; 5>10 = 0
	Is greater than equal to	5>=2 = 1; 5>=10 = 0
	Is equal to	5==2 = 0; 5==5 = 1
	Is not equal to	5!=1 = 1; 5!=5 = 0

Some more examples are:- 9 == 9 result 1 9 == -9 result 0 9 == 9.0 result 1 2+3*2 == 10 result 0 (2+3)*2 == 10 result 1

0 0 1 1 0 1

Some special points for relational operators

Characters are valid operands since they are represented by numeric values (ASCII values). ‘A’ == 65 results 1 //ASCII value of ‘A’ is 65 ‘a’ > ‘A’ result 1 //ASCII value of them are 97 and 65 respectively ‘A’ == ‘A’ result 1

The relational operators should not be used for comparing strings because this will result in string addresses being compared, not string contents. “A” == “a” result 0 “Hello” < “Hi” result 0

Logical operators


	Logical AND
	Logical OR
	Logical NOT


0	0	0
0	1	0
1	0	0
1	1	1

Logical OR ( | | ) gives result 1 (true) if atleast one operand is 1 (true) otherwise it gives result 0 (false). Truth table for logical OR (| |) is given below:-


0	0	0
0	1	1
1	0	1
1	1	1


0	1
1	0

Q) Find the output of the below program?

Some special points on logical operators

For logical AND (&&) operator, if the left operand yields a false (0) value, then the compiler does not evaluate the right operand and directly gives result false (0). Because in logical AND operand if anyone operand is false then the expression is false. Find the output of below two programs after learning increment and decrement operators.

For logical OR ( || ) operator, if the left operand yields a true (1) value, then the compiler does not evaluate the right operand and directly gives result 1 (true). We know that for the logical OR operator if anyone operand is true than expression is also true.

Increment and Decrement operators

Increment and decrement operators are also known as unary operators’ because they operate on a single operand. The increment operator (++) adds 1 to its operand and decrement operator (–) subtracts one.


	Increment Operator
	Decrement Operator

If it is pre operator, the value of the operand is incremented (or decremented) before it fetched for the computation. The altered value is used for the computation of the expression in which it occurs. If it is a post operator, the value of the operand is altered after it is fetched for the computation. The unaltered value is used in the computation of the expression in which it occurs.

Increment operator (++)

Decrement operator(- -).

1. Prefix operation (x = – -a; )

Special points for increment and decrement operator

1. It is to be noted that i++; executed faster than i=i+1; and i+=1

2. With increment and decrement operators, the operand must be a variable but not a constant or an expression.

lvalue means, that there isn’t a variable the operation is supposed to be performed on.

Conditional Operator

Syntax:- Variable = expression1? expression2 : expression3;

Here 5>2 So, Expression will be evaluated to the variable x.

Bitwise Operator

A bitwise operator operates on each bit of data. It is one of the low-level programming language features. Bitwise operator operates on integer only, not on floating-point numbers. Bitwise operations most often find application in device drivers such as modem programs, disk file routines, and printer routines.

List of bitwise operators are:-


&	Bitwise AND
\|	Bitwise OR
^	Bitwise Exclusive OR
~	Bitwise NOT/ Bitwise Negation
<<	Bitwise left shift
>>	Bitwise right shift

Other Operators

Except for above-discussed operators C support some other operators. Those are given below:-


	Address of Operator
	Value at adress operator
	Size operator
	Comma Operator
	Type-casting operator
	Array index operator
	Structure member access operator
	Structure member access operator

We will discuss here sizeof() and the comma operator. Other operators will be discussed later on their own topics.

Address operator

There are two address operator & and *.

We will learn about these operators in more details in the pointer concept.

Sizeof() operator

The operator sizeof() is a unary compile-time operator that returns the length, in bytes, of the variable or parenthesized type-specifier that it precedes.

To compute the size of the variable or constants, parentheses are optional.

Note the difference between the 4th and 5th lines. size(a+3) gives 4 bytes but sizeof a+3 gives 7 bytes as a result.

Comma Operator

Syntax:- variable = (expression1, expression2, ......., expresionN);

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Browse all the Topics Under Operator and Expressions: Operators

Arithmetic Operators
Assignment Operator s
Unary Operator
Increment and Decrement Operators
Relation Operator
Logical Operators

Types of Shorthand Assignment Operators

Shorthand Assignment Operators are Binary Operators which require 2 values or 1 variable and another value/expression. One on the left and the other on the right side.

The following are types of Shorthand Assignment Operators

This type of Operator is a combination of Arithmetic Operator ‘+’ and Assignment Operator ‘=’. This operator adds the variable on the left with the value on the right and then assigns/saves the result to the variable on the left.

These types of Shorthand Operators are used with a combination of Subtraction Arithmetic Operator ‘-‘ and Assignment operator ‘=’.

These Shorthand Operators use a combination of Multiplication type of Arithmetic Operator ‘*’ and Simple Assignment operator ‘=‘. The variable to the left is multiplied with the value or expression to the right side and then the result is stored into the variable defined to the left.

Here, a combination of Division Arithmetic operator ‘/’ and Simple Assignment Operator ‘=’ is seen. The variable is divided by the value first and then the value is stored to the left, in the variable.

This type of operator uses Modulus Operator ‘%’ and an Assignment Operator ‘=’ in its syntax. It returns the Remainder of the two operands and stores the value in the variable to the left side of the statement.

Apart from the Assignment Operators, the Shorthand Operators are also used to define the Bitwise Operators.

Some of them are:


\|=	Shorthand Bitwise Inclusive OR
&=	Shorthand Bitwise AND
^=	Shorthand Bitwise XOR
<<=	Shorthand Bitwise Left Shift
>>=	Shorthand Bitwise Right Shift
~=	Shorthand Bitwise Compliment
!=	Shorthand Inequality

FAQs on Shorthand Operators

Q1. Which of the following is a valid assignment operator?

All of the Above

Answer. Option D

Q2. What does the *= assignment operator do?

Multiplies the value twice
Multiplies variable with value once
Used as exponent like 2*3 = 8
None of the Above

Answer. Option B

Q3. Do the given two equations mean the same?

count += 1 ;

count = count + 1 ;

Answer. Option A

Q4. What is the final output of variable ‘a’ in the below program?

Answer. Option C.

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Assignment Operators in C Language | Shorthand operators in C Language

Assignment/shorthand operators are used to update the value of a variable in an easy way. There are various assignment operators provided by C language.


	It is used to assign some value to a . A=10
	It is used to increment the value of a numeric by adding some value to the existing value. A=10 A+=5 //A=A+5 A=15
	It is used to decrement the existing value of a numeric by subtracting some value from the existing value. A=10 A-=5 //A=A-5 A=5
	It is used to multiply existing value of a numeric variable by another value and then store the result in it. A=10 A=5 A=A5 A=50
	It is used to divide the existing value of a numeric variable by another value and then store the result in A=10 A/=5 //A=A/5 A=2
	It is used to divide the existing value of a numeric variable by another value and then storing the remainder in it. A=10 A%=5 //A=A%5 A=0
	It is used to apply bitwise AND operator on existing value of a numeric variable by another value and then storing the result in it. A=10 A&=7 //A=A&7 A=2
	It is used to apply bitwise OR operator on existing value of a numeric variable by another value and then storing the result in it. A=10 A\|=7 //A=A\|7 A=15
	It is used to apply bitwise XOR operator on existing value of a numeric variable by another value and then storing the result in it. A=10 A^=7 //A=A^7 A=13
	It is used to apply Bitwise LEFT SHIFT operator on existing value of a numeric variable by another value and then storing the result in it. A=10 A<<=1 //A=A<<1 A=20
	It is used to apply Bitwise RIGHT SHIFT operator on existing value of a numeric variable by another value and then storing the result in it. A=10 A>>=1 //A=A>>1 A=5

in C

in C.

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advantages of shorthand operator

What is the efficient way ???

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Is there an "and assignment operator" for && and || for shorthand?

To add a value and assign it back to itself, I would do this:

For making that shorthand, I can use the add assignment operator like this:

Is there a shorthand like this for the && and || operator for this?:

I tried the below, the results is not the same as above:

The result is not the same because x &&= y would not evaluate y if x was false, I assume. There is no short-circuiting compound operator. – Eric Lippert Commented Nov 20, 2015 at 4:51
1 Is this question just for knowledge or out of curiosity etc? Because x = x && y; itself is so short to write! – Nikhil Vartak Commented Nov 20, 2015 at 5:05
how the result is not same? – M.kazem Akhgary Commented Nov 20, 2015 at 6:31

2 Answers 2

You can see the list of C# operators here .

x &= y – AND assignment. AND the value of y with the value of x, store the result in x, and return the new value. x |= y – OR assignment. OR the value of y with the value of x, store the result in x, and return the new value.

When you say "the results is not the same," can you provide example values of x and y that you're testing? I think what you're observing is the difference between logical/bitwise AND/OR (&/|) and conditional AND/OR (&&/||). The latter will not evaluate y if it doesn't need to in order to figure out the value of the expression. If the evaluation of y has side effects, you would notice a difference between the bitwise and conditional operators.

No, there is not as it doesn't make too much sense.

According to MSDN , there are only the following shortand operators in C#:

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Assignment Operators in C are used to assign values to the variables. They come under the category of binary operators as they require two operands to operate upon. The left side operand is called a variable and the right side operand is the value. The value on the right side of the "=" is assigned to the variable on the left side of "=".
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Relational Operators. Shorthand Operators are operators that combine one of the arithmetic or bitwise operators with the assignment operator. Shorthand Operators are a shorter way of expressing something that is already available in the programming statements. Expressions or Values can be assigned to the variable using Shorthand Operators.
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Assignment Operators in C Language | Shorthand operators in C Language. Assignment/shorthand operators are used to update the value of a variable in an easy way. There are various assignment operators provided by C language.
Why are arithmetic assignment operators more efficient?
An example of thee shorthand Java Arithmetic operator is a += 4; for a=a+4; In The Complete Reference, Java 2, Herbert Schildt mentions "they are implemented more efficiently by the Java run-time system than are their equivalent" What makes its implementation more efficient than a=a+4;
advantages of shorthand operator
A guess: by "shorthand assignment operator" you probably mean operators like `+=' and `*='. (If you mean something else, ignore the rest of this message
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Assuming you are using built-in operators on integers, or sanely overloaded operators for user-defined classes, these are the same: a = a | b; a |= b; The '|=' symbol is the bitwise OR assignment operator. It computes the value of OR'ing the RHS ('b') with the LHS ('a') and assigns the result to 'a', but it only evaluates 'a' once while doing so.
Is there an "and assignment operator" for && and || for shorthand?
You can see the list of C# operators here. x &= y - AND assignment. AND the value of y with the value of x, store the result in x, and return the new value. x |= y - OR assignment. OR the value of y with the value of x, store the result in x, and return the new value.