C Programming for Experienced Engineers/

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Example 48: The Sum of the Digits of a Number

Example 48: The Sum of the Digits of a Number

Learn how to calculate the sum of the digits of a number using recursion.

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Problem

Write a recursive function that takes in a positive integer as input and calculates the sum of its digits.

Example

Input Output
0 0
5 5
345 12
5420
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