HackerRank Sum of Digits of a Five Digit Number Solution in C

 Objective

The modulo operator, %, returns the remainder of a division. For example, 4 % 3 = 1 and 12 % 10 = 2. The ordinary division operator, /, returns a truncated integer value when performed on integers. For example, 5 / 3 = 1. To get the last digit of a number in base 10, use  as the modulo divisor.

Task

Given a five digit integer, print the sum of its digits.

Input Format

The input contains a single five digit number, .

Constraints

Output Format

Print the sum of the digits of the five digit number.

Sample Input 0

10564

Sample Output 0

16

HackerRank Sum of Digits of a Five Digit Number Solution in C (Sample-1)

#include <stdio.h>

int main() {

    int n, sum = 0;

    scanf("%d", &n);  // Read the 5-digit number

    // Extract digits and sum them

    while (n > 0) {

        sum += n % 10;  // Add last digit

        n /= 10;        // Remove last digit

    }

    printf("%d\n", sum);  // Print the result

    return 0;

}

HackerRank Sum of Digits of a Five Digit Number Solution in C (Sample-2)

#include <stdio.h>

#include <string.h>

int main() {

    char num[6];  // 5 digits + 1 null terminator

    int sum = 0;

    scanf("%s", num);

    for (int i = 0; i < 5; i++) {

        sum += num[i] - '0';  // Convert char to int

    }

    printf("%d\n", sum);

    return 0;

}