C Program to Print Even and Odd Numbers From 1 to N Using While Loop

In this tutorial, we are going to see how to write a program to print even and odd numbers from 1 to n in C language using while loop. Considering we have an integer(N) and we need to print even and odd numbers from 1 to N using a C program.

There are four ways to check or print even and odd numbers in C, by using for loop, while loop, if-else, or by creating a function.

An even number is an integer exactly divisible by 2. Example: 0, 4, 8, etc.

An odd number is an integer that is not exactly divisible by 2. Example: 1, 3, 7, 15, etc.
 

 

Write a Program to Print Even and Odd Numbers From 1 To n in C Using While Loop

#include <stdio.h>
 
void main()
{
 int i,last;

 printf("Enter The Last Number : ");
 scanf("%d",&last);

 //While Loop

 //Code For Even Number List
 printf("\nEven Number List :\n ");
 
 i=2;
 while(i <= last)
 {
  printf(" %d",i);
  i = i + 2;
 }

 //Code For Odd Number List
 printf("\nOdd Number List :\n ");

 i=1;
 while(i <= last)
 {
  printf(" %d",i);
  i = i + 2;
 }
}

Output:

Enter The Last Number : 10

Even Number List :
  2 4 6 8 10
Odd Number List :
  1 3 5 7 9

 

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