why print statement return None, when we use method on the list in python

Question

why does this code print None and

a = [1,2,3,4]
print(a.reverse())

while this will print a reversed list

a = [1,2,3,4]
a.reverse()
print(a) 

Answer 1

Because the function reverse doesn't return anything, ence why you get a None

When you print(a.reverse()), you print the result of the function .reverse() on a, but reverse essentially modify "a" without returning anything