C Program for Addition of Individual Digits of a Number

Program 1

// Program for addition of individual digit of a number
#include<stdio.h>
#include<conio.h>
int main()
{
     int n,r,s=0;
     printf("\nEnter a number");
     scanf("%d",&n);
     while(n!=0)
     {
        r=n%10;
        s=s+r;
        n=n/10;
     }
    printf("Sum is %d ",s);
}