What's wrong with this 3 lines?

Question

When i define a function like this:
def func1(x,y):
print(x-2*y)

print(func1(6,2))

it gives as output:
2
None

My question is, what is this none ans where did it came from?

Answer 1

func1 does not retun , inside it you print 6-2*2 ,then you print None.
Just call func1(6,2) or modify to return x-2*y

def func1(x,y):
return x-2*y

print(func1(6,2))

or

def func1(x,y):
print(x-2*y)

func1(6,2)

Answer 2

I see now! Such a dumb mistake...
Thank you so much Szabó!!

Answer 3

I didn't quite mean that AG, I was talking about the "None" output