Clear button in calculator

[lucasbrino]

Hey! I have just started a python course and Im having a hard time to put a clear button on my calculator! Thanks for helping!
This is my code:

import re

print("First calculator")
print("Type 'quit' to exit\n")

previous = 0
run  = True

def performMath():
    global run
    global previous
    equation = ""
    
    if previous == 0:
        equation = input("Enter equation:")
    else:
        equation = input(str(previous))

    if equation == 'quit':
        print("Goodbye, human!")
        run = False
    else:
        equation = re.sub('[a-zA-Z:" "]', '', equation)

        if previous == 0:
            previous = eval(equation)
        else:
            previous = eval(str(previous) + equation)

        print("You typed", previous)

while run:
    performMath()

[jefsummers]

Look at your post. Without the indentation it is impossible to figure out what is wrong. Please repost using the python /python marks.

[t4keheart]

You already know how to use functions, why not write functions to clear/close and call them from your if/else?

like this:

def main():
   *your calculator code*
   if something:
      clear()
   else:
      close()

def clear():
   print(" ")
   main()

def close():
   exit()

main()