Sum of Digits in C program

Sum of Digits of a number in C using for loop

take the number from the user, divide the number into individual digits, and adding those individuals (Sum) digits using for Loop

#include<stdio.h>
int main()
{
    int sum=0,n,r,i;
    printf("\n enter the number:");
    scanf("%d",&n);
    for(i=n;i>0;i=i/10)
    {
        r=i%10;
        sum+=r;
    }
    printf("\n sum of digit=%d",sum);
    return 0;
}  

Reduce the number of line of code by writing for loop in these ways

for(i=n;i>0;sum+=i%10,i=i/10) {
   }

C program to print sum of digit using while loop

take the number from the user, divide the number into individual digits, and adding those individuals digits using for Loop

#include<stdio.h>
int main()
{
    int r,n,sum=0;
    printf("enter the number:");
    scanf("%d",&n);
    while(n>0)
    {
    	r=n%10;
    	sum=sum+r;
    	n=n/10;
     }
     printf("\n sum of digit=%d",sum);
     return 0;
}