how to use a function so that it reutunrs variables in python code example

Example 1: how to return an output to a function in Python

''' if you don't know def can make a function, 
I am making a simple squaring function to explain''' 
# space after parentisis is needed
def square(x) :
  s = x*x
  # do it with the return keyword!
  return s

Example 2: how to set the return value of a function in pytohn

def showPrompt(symbol :str, container :str) -> None:
    while container.lower() != "exit":
        container = str(input(symbol))