How can I pass "number variable" in function as reference in python?

Question

For better understanding here is a example code.

num = 0


def func(num):
    num += 1

func(num)
print(num)

This code prints 0 but I want 1(incremented by func()), how can I do that?

How can I do that? Is it possible?

Answer 1

Long story short, you can't just put number in function and expect it to be passed by reference.

In python...

• (act like) pass by value : whole numbers, strings or tuples
• (act like) pass by reference : python list

You should visit here for more info about "Pass(call) by Object Reference".

https://www.geeksforgeeks.org/is-python-call-by-reference-or-call-by-value/