Don't understand this coding challenge problem

Question

def f(n):
if n == 0:
return 0
else:
return f(n-1) + 100

print(f(2))

Answer: 200

I'm not sure why the answer isn't 102

Answer 1

f(2) = f(2-1) + 100 = f(1 - 1) + 100 + 100 = f(0) + 200 = 200

Answer 2

Thank you so much! This makes perfect sense