#Simple Calculator from High School Computer Programming - python v3.0
#Function definitions for each operation
def multiply(x, y):
   print(x * y)

def divide(x, y):
   print (x / y)

def add(x, y):
   print (x + y)

def subtract(x, y):
   print (x - y)
#print is used in Python to print out on the screen
print("Choose an operation")
print("1.Multiply")
print("2.Divide")
print("3.Add")
print("4.Subtract")
#creates a variable 'number' to get the input from a user
number = input("Enter choice between 1 and 4: ")
#Declares a variable 'x' and 'y' and saves the input as an integer, input is saved as a string by default!
x = int(input("Enter the first whole number "))
y = int(input("Enter the second whole number: "))
#Basically a goto check. If a number is equal to one of the operations, it does it. Otherwise, an error occurs.
if number == '1':
    multiply(x,y)
elif number == '2':
    divide(x,y)
elif number == '3':
    add(x,y)
elif number == '4':
    subtract(x,y)
else:
   print("Incorrect responses")

#Python 2: raw_input() and print in python 2
#Python 3: input() and print() in python 3