How to print the value of a variable from a function in python?

Question

Python

I need to output the value of the variable a from the fun() function.
How to do it?
Here is my code:

def fun():
  a = int ( input () )
fun ()

if a == 3:
  print ( '123' )
else:
  print ( '456')

This is the error it gives:

Traceback (most recent call last):
  File "123.py", line 5, in <module>
    if a == 3:
NameError: name 'a' is not defined

Answer 1

In this form, no way. Read about scope here , or here . It's better in a book.
In your case, as a solution:

def fun():
    return int(input())

a = fun()

if a == 3:
    print('123')
else:
    print('456')