Recursive function

Hi, today I’m sharing a recursive funtion in python. Recursive in python means the ‘def’ function to call itself. The goal is to sum up the numbers to the number I want. For example, if I put in 3:

1 + 2 + 3 = 6

# def = makes a new function
def sum(num):
    # if we have an 'if', we should also have an 'else'.
    if num == 0:
        return 0
    else:
        return sum(num - 1) + num


print(sum(2))

Outcome:

Dats all. Bai.