Please, explain me why none?

Question

def step(a, b, c):
if b == 1:
k=a*c
return(k)
else:
if b % 2 == 1:
c = c*a
b = b//2
a = a*a
a = step(a,b,c)
else:
b = b//2
a = a*a
a = step(a,b,c)

chislo = 2
stepin = 10
answer = 0

answer = step(chislo, stepin, 1)

print(answer)

Answer 1

You didn't return anything in both of the else statements

Answer 2

What should your code do ?

Answer 3

Does it have to be recursive ? Anyway, you can immediatly return a at the end of both else statements assuming that you code is correct.
Also, what is the use of c variable, it seems to just multiply the output by c

Answer 4

A recursive function is a function that calls itself, and it's weird that you ask this question because people don't just make recursive functions by luck.
If it does not have to be recursive, why not just:

def step(a, b, c):
return (a**b)*c

Answer 5

Thanks! I made return for else and it's ok

Answer 6

I believe you can handle this situation.
Advise you use debugger in IDE like VSCODE, and go step in your function.

Answer 7

Nothing is returned in any of your else statements

Answer 8

Please tell me what and how I should return? Thank you!

Answer 9

We need to be elevated to a degree

Answer 10

You know, I just started learning programming, and I don't quite understand the word "recursive." Is it how?)

Answer 11

Maybe you could replace both appearances of "a = step(a, b, c)" with "return step(a, b, c)".

Answer 12

answer = 0 and you said print answer

Answer 13

Mohamed where did the line before the last line go ?

Answer 14

Actually answer is None

Answer 15

Mohamed thanks for your explanation

Answer 16

Chandan Pandey thanks for repeating what had already been said