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Functions and ScopeCoding problems

Functions and Scope: coding problems

Write a program that reads the input and prints the answer. Run checks it against every test, including hidden ones.

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A shop prints a check code on every receipt. The code is the sum of the digits of the amount, ignoring the sign, so -4096 gives 19.
Write a recursive method sumDigits(long n) that adds the last digit to the sum of the rest, with a base case for a single digit. Read one number and print its digit sum.
Input. One line with a whole number n, where -10^18 <= n <= 10^18.
Output. One integer: the sum of the digits of the absolute value of n.
Example 1 input
```
0
```
Output
```
0
```
Example 2 input
```
9
```
Output
```
9
```
LanguageC#
using System; class Program { static void Main() { string[] tokens = Console.In.ReadToEnd().Split((char[]?)null, StringSplitOptions.RemoveEmptyEntries); // your code here } }