human
what variable to use to quit a program in.
assistant
Here is a Python function to what variable to quit a program

import sys

def quit_program():
    """
    Quit the program.
    """
    print("Quitting the program.")
    sys.exit()

# Enter the command
command ="red airplane"

# Calling the function
if command == "quit":
    quit_program()

#Remember to inspect code for bugs.