Add digits of number in C

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To add the digits of a number in C, you can follow these steps:

Extract each digit from the number.

Sum up all the extracted digits.

Display the result.

Algorithm to add the digits of a number in C:

Initialize a variable to store the sum of digits, let's call it sum, and set it to 0.

Use a loop to extract digits from the number until it becomes 0.

Inside the loop, extract the rightmost digit of the number using the modulo operator (%) and add it to the sum.

Remove the rightmost digit from the number using integer division (/).

Repeat steps 3-4 until the number becomes 0.

Display the value of sum, which represents the sum of digits.

Example:

// program for adding the digits of a number in C
#include<stdio.h> 

int main() {
    int num, digit, sum = 0;

    // Input number from the user
    printf("Enter a number: ");
    scanf("%d", &num);

    // Extract digits and add them to the sum
    while (num != 0) {
        digit = num % 10;   // Extract the rightmost digit
        sum += digit;       // Add the digit to the sum
        num /= 10;          // Remove the rightmost digit
    }

    // Display the sum of digits
    printf("Sum of digits: %d\n", sum);

    return 0;
}

Output: