I am trying to write a function that calculates the sum of digits in a given number. Here are the details:

Input:

Enter a number: 12345

Output:

Sum of digits: 15

Requirements:

1. The function should take an integer as input.
2. The function should return the sum of the digits of the given integer.
3. The function should handle both positive and negative integers.
4. For example:
   • Input: 12345 should return 15 (because 1+2+3+4+5 = 15)
   • Input: -12345 should also return 15 (ignoring the sign)

Additional Information:

• I am looking for solutions that are easy to understand for a beginner.
• If there are any built-in functions in other languages that simplify this task, please mention them.

What I have tried so far:

I have written some code in Python, but I am not sure if it handles all cases correctly. Here is my attempt:

num = 12345
sum = 0
for digit in str(num):
        sum = sum + int(digit)
        print(sum)