Write a program in C to find the sum of the digits of a number.

 #include <stdio.h>

#include <conio.h>

int main()

{

int num, sum;

printf("Enter a number: ");

scanf("%d", &num);

printf("Sum of all digits of %d is: ", num);

while (num>0) {

sum += num%10;

num /= 10;

}

printf("%d", sum);

getch();

return 0;

}