calculator.py

#!/usr/bin/env python


print("Welcome to Calculator v1.1")
print("     A)Addition")
print("     B)Subtraction")
print("     C)Multiplication")
print("     D)Division")
print("     E)Press Enter to Exit")

choice = raw_input("Pick your calculation:   ")

Loop = "True"

while True:
    if choice == "A":
        X = input("Enter the first number:  ")
        Y = input("Enter the second number: ")
        print("Your answer is:   " + str(X+Y))

        print("     A)Addition")
        print("     B)Subtraction")
        print("     C)Multiplication")
        print("     D)Division")
        print("     E)Press Enter to Exit")
        choice = raw_input("Pick your calculation:  ")

    if choice == "B":
        X = input("Enter the first number:  ")
        Y = input("Enter the second number: ")
        print("Your answer is:   " + str(X-Y))

        print("     A)Addition")
        print("     B)Subtraction")
        print("     C)Multiplication")
        print("     D)Division")
        print("     E)Press Enter to Exit")
        choice = raw_input("Pick your calculation:  ")

    if choice == "C":
        X = input("Enter the first number:  ")
        Y = input("Enter the second number: ")
        print("Your answer is:   " + str(X*Y))

        print("     A)Addition")
        print("     B)Subtraction")
        print("     C)Multiplication")
        print("     D)Division")
        print("     E)Press Enter to Exit")
        choice = raw_input("Pick your calculation:  ")

    if choice == "D":
        X = input("Enter the first number:  ")
        Y = input("Enter the second number: ")
        print("Your answer is:   " + str(X/Y))

        print("     A)Addition")
        print("     B)Subtraction")
        print("     C)Multiplication")
        print("     D)Division")
        print("     E)Press Enter to Exit")
        choice = raw_input("Pick your calculation:  ")

    if choice == "E":
        break