C Program to Calculate Sum the Digits of a Given Number

program:

#include<stdio.h>
int main()
{
 int dummy,n,sum=0,x;
 printf("Enter a number\n");
 scanf("%d",&n);
 dummy=n;
 while(n>0)
{
 x=n%10;
 sum=sum+x;
 n=n/10;
}
 printf("The sum of all digits in %d is %d\n",dummy,sum
 return 0;
}

output: