Assignment operators in C

 Assignment operators are used to assign values to variables.  Consider the following,

int val = (10 + 5);

Here, assignment operator assigns the resultant value of the expression at the right side to left operand.

Below are some of the compound assignment operators available in C language.

Operator	Expression	Equivalent Expression
+=	x += 200	x = x + 200
-=	x -= 200	x = x - 200
*=	x *= 200	x = x * 200
/=	x /= 200	x = x / 200
%=	x %= 200	x = x % 200
<<=	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

Example C program using assignment operators:

 
  #include <stdio.h>
  int main() {
        int a, b, c, d, e;  // variable declaration
        a = b = c = d = e = 100;  // assign 100 to a, b, c, d & e

        a += 10; // a = a + 10
        printf("Value of a is %d\n", a);

        b -= 10; // b = b - 10
        printf("Value of b is %d\n", b);

        c *= 10; // c = c * 10
        printf("Value of c is %d\n", c);

        d /= 10; // d = d / 10
        printf("Value of d is %d\n", d);

        e %= 10; // e = e % 10
        printf("Value of e is %d\n", e);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  Value of a is 110
  Value of b is 90
  Value of c is 1000
  Value of d is 10
  Value of e is 0