Increment and Decrement operators in c

Increment Operator

Increment operator in c language is used to increase variable value. It will increase one value in variable. We use ++ with variable to increase value.

Types of Increment Operator

There are two types of Increment Operators:-

• Post increment (x++):- in post increment, first task will be performed and then value will be increased.
• Pre Increment (++x):- in pre increment, first value will be increased and then task will be performed.

Example of Increment Operator

In the following example, we are using both pre and post increment operator. First pre increment will be performed. After pre increment x value would be 11. After that sum will be performed. Sum will be 33 initially. After that two times post increment will be performed then x value would be 13 and y value will be 35.

#include<stdio.h>
void main()
{
    int x=10;
    int y;

    y=++x + x++ + x++;
    printf("Y is %d",y);
    printf("\nX is %d",x);
}

		
		
		Figure 1
		
		

Decrement Operator

Decrement operator in c language is used to decrease variable value. It will decrease one value in variable. We use -- with variable to increase value.

Types of Decrement Operator

There are two types of Decrement Operators:-

• Post Decrement (x--):- in post Decrement, first task will be performed and then value will be decreased.
• Pre Decrement (--x):- in pre Decrement, first value will be decreased and then task will be performed.

Example of Decrement Operator

In the following example, we are using both pre and post Decrement operator. First pre Decrement will be performed. After pre increment x value would be nine. After that sum will be performed. Sum will be 27 initially. After that two times post Decrement will be performed, then x value would be seven and y value will be 25.

		
		#include<stdio.h>
void main()
{
    int x=10;
    int y;

    y=--x + x-- + x--;
    printf("Y is %d",y);
    printf("\nX is %d",x);
}

		
		

		
		
		Figure 2