Sum of digits in C

In the previous post we learn about What is palindrome number and How to write a program  for palindrome number.

In this post we will learn how to write a program for sum of digits in C.
Sum of digits means addition of two or more than two numbers for example number 456 will be 15.

456
4+5+6=15

Program for Sum of digits:

#include <stdio.h>

#include <conio.h>

int main()

{

    int n, num, rem, sum=0;

clrscr();

        printf("Enter number");

        scanf("%d",&num);

        while(num>0)

        {

        rem=num%10;

        sum=sum+rem;

        num=num/10;

}

    

    printf("sum of digit=%d",sum);

    getch();

}

Output:
  Enter number: 456

  Sum of digit: 15