ewce09.azraftaohid.me/L2T1/CSE 278/Practices/w05/digit_sum.c

#include <stdio.h>

int main() {
	int input;
	
	printf("Enter an integer: ");
	scanf("%d", &input);

	int sum;
	for (int remainder = input; remainder > 0; remainder /= 10) {
		int lastDigit = remainder % 10;
		sum += lastDigit;
	}

	printf("Summation of all the numbers is %d", sum);
}