C Program to Compute Sum of Digits in a given Integer:

This is a C program to compute the sum of digits in a given integer.

Problem Description

This program computes the sum of digits in a given integer.

Problem Solution

• Take the integer as input.

• Divide the input integer by 10, obtain its remainder and quotient.

•  Increment the new variable with the remainder got at step 2.

• Repeat the step 2 & 3 with the quotient obtained until the quotient becomes zero.

•  Print the output and exit.

  Program/Source Code

/*
 * C program to accept an integer & find the sum of its digits
 */
#include <stdio.....

This is a C program to compute the sum of digits in a given integer.

Problem Description

This program computes the sum of digits in a given integer.

Problem Solution

• Take the integer as input.

• Divide the input integer by 10, obtain its remainder and quotient.

•  Increment the new variable with the remainder got at step 2.

• Repeat the step 2 & 3 with the quotient obtained until the quotient becomes zero.

•  Print the output and exit.

  Program/Source Code

/*
 * C program to accept an integer & find the sum of its digits
 */
#include 
 
void main()
{
    long num, temp, digit, sum = 0;
 
    printf("Enter the number \n");
    scanf("%ld", &num);
    temp = num;
    while (num > 0)
    {
        digit = num % 10;
        sum  = sum + digit;
        num /= 10;
    }
    printf("Given number = %ld\n", temp);
    printf("Sum of the digits %ld = %ld\n", temp, sum);
}

Program Explanation

1. Take an integer as a input and store it in the variable num.

2.  Initialize the variable sum to zero.

3. Divide the input integer by 10 and obtain its remainder & quotient.

4. Store the remainder in the variable digit.

5. Increment the variable sum with variable digit.

6. Store the quotient into the variable num.

7. Repeat the steps 3,4,5,6 with the new num.

8. Do step 7 until the quotient becomes zero.

9. Print the variable sum as output and exit.

Output:

Enter the number

300

Given number = 300

Sum of the digits 300 = 3

 

 

Enter the number

16789

Given number = 16789

Sum of the digits 16789 = 31