Understanding Assignment Operators in C# Programming: Essential Concepts and Usage

There are following assignment operators supported by C# −

Operator	Description	Example
=	Simple assignment operator, Assigns values from right side operands to left side operand	C = A + B assigns value of A + B into C
+=	Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand	C += A is equivalent to C = C + A
-=	Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand	C -= A is equivalent to C = C - A
*=	Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand	C *= A is equivalent to C = C * A
/=	Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand	C /= A is equivalent to C = C / A
%=	Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand	C %= A is equivalent to C = C % A
<<=	Left shift AND assignment operator	C <<= 2 is same as C = C << 2
>>=	Right shift AND assignment operator	C >>= 2 is same as C = C >> 2
&=	Bitwise AND assignment operator	C &= 2 is same as C = C & 2
^=	bitwise exclusive OR and assignment operator	C ^= 2 is same as C = C ^ 2
|=	bitwise inclusive OR and assignment operator	C |= 2 is same as C = C | 2

Example

The following example demonstrates all the assignment operators available in C# −

 

using System;

namespace OperatorsAppl {

   class Program {
   
      static void Main(string[] args) {
         int a = 21;
         int c;
         c = a;
         Console.WriteLine("Line 1 - =  Value of c = {0}", c);
         
         c += a;
         Console.WriteLine("Line 2 - += Value of c = {0}", c);
         
         c -= a;
         Console.WriteLine("Line 3 - -=  Value of c = {0}", c);
         
         c *= a;
         Console.WriteLine("Line 4 - *=  Value of c = {0}", c);
         
         c /= a;
         Console.WriteLine("Line 5 - /=  Value of c = {0}", c);
         
         c = 200;
         c %= a;
         Console.WriteLine("Line 6 - %=  Value of c = {0}", c);
         
         c <<= 2;
         Console.WriteLine("Line 7 - <<=  Value of c = {0}", c);
         
         c >>= 2;
         Console.WriteLine("Line 8 - >>=  Value of c = {0}", c);
         
         c &= 2;
         Console.WriteLine("Line 9 - &=  Value of c = {0}", c);
         
         c ^= 2;
         Console.WriteLine("Line 10 - ^=  Value of c = {0}", c);
         
         c |= 2;
         Console.WriteLine("Line 11 - |=  Value of c = {0}", c);
         Console.ReadLine();
      }
   }
}

When the above code is compiled and executed, it produces the following result −

Line 1 - = Value of c = 21
Line 2 - += Value of c = 42
Line 3 - -= Value of c = 21
Line 4 - *= Value of c = 441
Line 5 - /= Value of c = 21
Line 6 - %= Value of c = 11
Line 7 - = Value of c = 11
Line 9 - &= Value of c = 2
Line 10 - ^= Value of c = 0
Line 11 - |= Value of c = 2