Python - Calc (FB - LearnPython.org)

#!/usr/bin/env python3

#
# https://www.facebook.com/groups/learnpython.org/permalink/1173109739420308/
#

# its a claculater program

# in the begning we are creating our own function using defr operator
def menu():
    # print what we want to print
    print("welcome to claculator")
    print("your options are:")
    print()
    print("1. addition")
    print("2. subtraction")
    print("3. multiplication")
    print("4. division")
    print("5. quit clac")
    print()
    return input("choose your option: ")

# now def fn for add two nos and same for all
def add(a, b):
    print(a, "+", b, "=", a+b)

def sub(a, b):
    print(a, "-", b, "=", a-b)

def mul(a, b):
    print(a, "*", b, "=", a*b)

def div(a, b):
    print(a, "/", b, "=", a/b)

# now code really starts from here after defining

while True:

    choice = menu()

    # choice is a text so compare with text "1", "2", etc.
    if choice == "1":
        x = int(input("add this: "))
        y = int(input("to this : "))
        add(x, y)
    elif choice == "2":
        x = int(input("subtract this: "))
        y = int(input("from this : "))
        sub(x, y)
    elif choice == "3":
        x = int(input("multiply this: "))
        y = int(input("by this : "))
        mul(x, y)
    elif choice == "4":
        x = int(input("divide this: "))
        y = int(input("by this : "))
        div(x, y)
    elif choice == "5":
        break # leaving `while True` loop

print("thank you for using pyclac!")