Functional Programming

Question

def apply_twice(func, arg):
return func(func(arg))

def add_five(x):
return x + 5

print(apply_twice(add_five, 10))

Can someone please explain how the above example returned an answer of 20?

Answer 1

Thank you Ali and Gordie! I understand it now!

Answer 2

apply_twice(add_five, 10)
does the same as
add_five(add_five(10))
So it adds 5 to 10 twice, which results in 20.