🚀 Programming Example
C Program to Find Sum of Digits of a Number using Recursion
C Program to Find Sum of Digits of a Number using Recursion
/*
* C Program to find Sum of Digits of a Number using Recursion
* atnyla.com
*/
#include <stdio.h>
int sum (int a);
int main()
{
int num, result;
printf("Enter the number: ");
scanf("%d", &num);
result = sum(num);
printf("Sum of digits in %d is %d\n", num, result);
return 0;
}
int sum (int num)
{
if (num != 0)
{
return (num % 10 + sum (num / 10));
}
else
{
return 0;
}
}
Enter the number: 123
Sum of digits in 123 is 6
In this C program, we are reading the integer number using the ‘num’ variable. The function sum() is used to find sum of digits of a number using recursion.
In function sum() check the value of ‘num’ variable is not equal to 0. If the condition is true execute the statement. Divide the value of ‘num’ variable by 10 integer value. Add the resulted value along with the modulus of the value of ‘num’ variable. Print the sum of digits of a number using recursion.
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.