Simple Calculator in Python

I wrote this simple calculator in Python programming language while writing my own book and also to learn the language itself.

I am currently accepting programming work inventory system, enrollment system, accounting system, payroll system, information system, website design and development using WordPress, IT projects, school and application development, programming projects, thesis, and capstone projects, IT consulting work, computer tutorials, and web development work kindly contact me in the following email address for further details. If you want to advertise on my website kindly contact me also in my email address also. Thank you.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

Here in Bacolod City, Negros Occidental I also accepting computer repair, web development using WordPress, Computer Networking, and Arduino Project development at a very affordable price.

My personal website is http://www.jakerpomperada.com

My programming website is http://www.jakerpomperada.blogspot.com

I am also a book author you can purchase my books on computer programming and information technology in the following links below.

https://www.unlimitedbooksph.com/

Program Listing

def menu():

    print();

    print("\t\t Simple Calculator Program");

    print();

    print("\tWritten By Jake R. Pompreada")

    print();

    print("\t1. Addition");

    print("\t2. Subtraction");

    print("\t3. Multiplication");

    print("\t4. Division");

    print("\t5. Quit Program");

    print();

    return int(input("\tChoose your option: "));

def add(a, b):

    print();

    print("\t",a, "+", b, "=", a + b);

def sub(a, b):

    print();

    print("\t",a, "-", b, "=", a - b);

def mul(a, b):

    print();

    print("\t",a, "*", b, "=", a * b);

def div(a, b):

    print();

    print("\t",a, "/", b, "=", a / b);

loop = 1

choice = 0

while loop == 1:

    choice = menu()

    if choice == 1:

        print();

        add(int(input("\tAdd this: ")), int(input("\tto this: ")))

    elif choice == 2:

        print();

        sub(int(input("\tSubtract this: ")), int(input("\tfrom this: ")))

    elif choice == 3:

        print();

        mul(int(input("\tMultiply this: ")), int(input("\tby this: ")))

    elif choice == 4:

        print("\n");

        div(int(input("\tDivide this: ")), int(input("\tby this: ")))

    elif choice == 5:

        loop = 0

print();

print("\tThank you for using this program.");

print();

print("\tEND OF PROGRAM");