C/Sum of Digits/DO WHILE/DIGITSUM.C
#include<stdio.h>
#include<conio.h>
int main()
{
int n,i,s=0;
printf("Enter a number : ");
scanf("%d",&n);
do {
i=n%10;
s=s+i;
n=(n-i)/10;
} while(n>0);
printf("Sum of digits is %d",s);
getch();
return 0;
}