Assignment Operators in C Programming Language

Rumman Ansari   Software Engineer   2019-03-31   14623 Share
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An assignment operator is used for assigning a value to a variable. The most common assignment operator is =

Operator Example Same as
= a = b a = b
+= a += b a = a+b
-= a -= b a = a-b
*= a *= b a = a*b
/= a /= b a = a/b
%= a %= b a = a%b

Assignment operator supported by C are as follows.

operator description example
= assigns values from right side operands to left side operand A=B
+= adds right operand to the left operand and assign the result to left A+=B is same as A=A+B
-= subtracts right operand from the left operand and assign the result to left operand A-=B is same as A=A-B
*= mutiply left operand with the right operand and assign the result to left operand A*=B is same as A=A*B
/= divides left operand with the right operand and assign the result to left operand A/=B is same as A=A/B
%= calculate modulus using two operands and assign the result to left operand A%=B is same as A=A%B
<<= Left shift AND assignment operator. A <<= 2 is same as A = A<< 2
>>= Right shift AND assignment operator. A >>= 2 is same as A = A >> 2
&= Bitwise AND assignment operator. A &= 2 is same as A = A & 2
^= bitwise exclusive OR and assignment operator. A ^= 2 is same as A = A ^ 2
|= bitwise inclusive OR and assignment operator. A |= 2 is same as A = A | 2

Program

// C Program to demonstrate the working of logical operators

#include
int main()
{
int a = 5;
      int b = 10;
      int c = 0;

      c = a + b;
      printf("c = a + b = %d \n",c);

      c += a ;
      printf("c += a  = %d \n",c);

      c -= a ;
      printf("c -= a = %d \n",c);

      c *= a ;
      printf("c *= a = %d \n",c);

      a = 10;
      c = 15;
      c /= a ;
      printf("c /= a = %d \n",c);

      a = 10;
      c = 15;
      c %= a ;
      printf("c %= a  = %d \n",c);

      c &= a ;
      printf("c &= a  = %d \n",c);

      c ^= a ;
      printf("c ^= a   = %d \n",c);

      c |= a ;
      printf("c |= a   = %d \n",c);
      c <<= 2 ;
      printf("c <<= 2 = %d \n",c);

      c >>= 2 ;
      printf("c >>= 2 = %d \n",c);

      c >>= 2 ;
      printf("c >>= 2 = %d \n",c);
}

Output

c = a + b = 15
c += a  = 20
c -= a = 15
c *= a = 75
c /= a = 1
c = a  = 5
c &= a  = 0
c ^= a   = 10
c |= a   = 10
c <<= 2 = 40
c >>= 2 = 10
c >>= 2 = 2
Press any key to continue . . .
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