C Assignment Operators

C assignment operators are used to assigned the value of a variable or expression to a variable. The syntax of assignment operators is:

1.var = expression;

2.var = var;

Beside = operator, C programming language supports other short hand format which acts the same assignment operator with additional operator such as +=, -=, *=, /=, %=.

1.var +=expression; //means

2.var = var + expression;

Each assignment operator has a priority and they are evaluated from right to left based on its priority. Here is assignment operator and its priority: =, +=, -=, *=, /=, %=.

A simple C program to demonstrate assignment operators:

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01.#include <stdio.h>

02./* a program demonstrates C assignment operator */

03.void main(){

04.int x = 10;

05. 

06./* demonstrate = operator */

07.int y = x;

08.printf("y = %d\n",y);

09. 

10./* demonstrate += operator */

11.y += 10;

12.printf("y += 10;y = %d\n",y);

13./* demonstrate -= operator */

14.y -=5;

15.printf("y -=5;y = %d\n",y);

16. 

17./* demonstrate *= operator */

18.y *=4;

19.printf("y *=4;y = %d\n",y);

20. 

21./* demonstrate /= operator */

22.y /=2;

23.printf("y /=2;y = %d\n",y);

24. 

25.}

Here is the output:

y = 10
y += 10;y = 20
y -=5;y = 15
y *=4;y = 60
y /=2;y = 30

source:cprogramlanguage.net