INCREMENT OPERATORS IN C

INCREMENT OPERATORS IN C WITH EXAMPLE

The increment operators used to adds 1 to previous value. Increment operator is unary operator because only one variable is used.

There are 2 type in increment operator. They are
1. Postfix increment operator
2. Prefix increment operator

Syntax:-

For postfix

variable++

For prefix

++variable

Both prefix and postfix increment operator are same thing when they used independently(i++ or ++i) ie adds 1 to previous value. But they behave differently when they used in expression on the right hand side of assignment statement(num=i++ or num=++i)

Postfix increment operator:-

Output:-

i=2
num=1

Execution:-

In postfix increment operator, fist assign value to left side variable(num) than increment by 1(i)

Here in our example first i is zero(i=0) than i increment by 1(i++). here i value is 1. 

Next statement is num = i++;

Here postfix is used so first i value is assigned to num ie 1 than i is increment by 1 ie i value becomes 2.

Prefix increment operator

Output:-

i=2
num=2

Execution:-

In prefix increment operator, first increment(i) by 1 than result value is assigned to left side variable(num)

Here in our example first i is zero(i=0) than i increment by 1(++i). here i value is 1. 

Next statement is num = ++i;

Here prefix is used so first i is increment by 1 ie i value becomes 2. Than value of i is assigned to num ie 2

Example:-

Program to fined sum of N odd number.