c-program | program to print all even and odd from 1 to n natural number in c-programming

 c-program to print the all even and odd number form 1 to n natural numbers

In this program, we will discuss the C program to display all even and odd  number from 1 to n natural number.
In this program, we are going to learn about how to find  odd or even numbers from 1 to given number using the while loop in the C language.
What is Even or Odd
When the number is divided by 2 and the the remainder becomes zero then the  number is called as the even number on the other sides when it is divided by 2 and the remainder  becomes 1 they are called odd numbers .

program to print even and odd number  from 1 to n natural number using while loop.

#include<stdio.h>
#include<conio.h>
void main()
{
         int i,n;
         printf("enter the number\n");
         scanf("%d",&n);
         printf("\n even number \n");
         i=2;
         while(i<=n){
               printf("%d ",i);
               i=i+2;
         }
         printf("\nodd number\n");
         i=1;
         while(i<=n){
                  printf("%d ",i);
                  i=i+2;
         }
         getch();
}

output:-

 Another way to solve this program :-

/*program to print even number from 1 to n  by using while loop*/
#include<stdio.h>
#include<conio.h>
void main()
{
  int i=1,n;
  printf("enter the number");
  scanf("%d",&n);
  while(i<=n)
  {
           if(i%2==0){
                  printf("%d\n",i);
                  i++;
           }
           else{
                printf("%d ",i);
                i++;
           }
  }
  getch();
}

output :-  even number 2,4,6,........

                  odd number 1,3,5,7,9.........

For more c-programming :-

1.c-program to check which number is divisible by 2,3,9

2.c-program to check which number is divisible by 4,6,9.

3.c-program to check weather a number is prime or not

4.c-program to print all prime number form 1 to n natural number