summing up the digits in c code example

Example 1: adding digits of a number in c

//program to find the sum of digits:

#include<stdio.h>
int main()
{
  int num,sum=0,r,temp;
  printf("Enter the number:\n ");  //taking input from the user
  scanf("%d",&num);
  
  temp=num;           //assigning num to temporary variable
  
  while(temp!=0)
  {
    r=temp%10;
    sum=sum+r;
    temp=temp/10;
  }
  printf("\nGiven number = %d",num);
  printf("\nSum of the digits = %d",sum);
}

//code By dungriyal

Example 2: sum of digits in c using for loop

#include <stdio.h>
int main()
{
   int n, sum = 0, r;

   printf("Enter a number\n");

   for (scanf("%d", &n); n != 0; n = n/10) {
      r = n % 10;
      sum = sum + r;
   }

   printf("Sum of digits of a number = %d\n", sum);

   return 0;
}