C Increment Operators

We can use increment operator to increase or decrease the value of variable. C increment operators support in both prefix and postfix form. Here are syntax of of increment operators:

	variable++;
	variable--;
	++variable;
	--variable;

Here is demonstration program:

#include <stdio.h> 
/* a program demonstrates C increment operators */
void main(){
    int x = 10;
    int y = 0;
    printf("x = %d\n",x);
    
    /* demonstrate ++  prefix operator */
    y = ++x;
    printf("y = ++x;y = %d\n",y);
    
    /* demonstrate ++  postfix operator */
    y = x++;
    printf("y = x++;y = %d\n",y);
 
    /* demonstrate --  prefix operator */
    y = --x;
    printf("y = --x;y = %d\n",y);
 
    /* demonstrate --  postfix operator */
    y = x--;
    printf("y = x--;y = %d\n",y);
 
    /* keep console screen until a key stroke */
    char key;
    scanf(&key);
}

And the output is:

x = 10
y = ++x;y = 11
y = x++;y = 11
y = --x;y = 11
y = x--;y = 11