# Sum of digits of a Number in C2 min read

This tutorial is to find the sum of digits of a number using for loop and while loop in C. You need to have knowledge of the following topics in C.

Explanation:
To find the sum of the digits means to add all the digits present in the number. For example: consider a number 123, sum of the digits of 123 will be `1+2+3 = 6`.

## C Program to find the sum of the digits of a number using for loop

Output:

`Enter a number: 245 Sum of digits of a number: 11`

## C Program to find the sum of the digits of a number using while loop

To find the sum of a digit in c using while loop is similar to the for loop, here you need to initialize i with num after the input is taken from the user and i increment is done inside the while body as shown below.

Output:

`Enter a number: 123 Sum of digits of a number: 6`

## C Program to find the sum of the digits of a number using recursion function

Output:

`Enter a number: 123 Sum of digits of a number: 6`

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