Two simple calculator programs

turtle_calculator.py

# Any line that starts with a pound sign (#) is known as a comment, Python knows to ignore comments
# Comments are useful for explaining what you are doing in a program to yourself or someone else who might be working on the same program

# Let's write a calculator program that has the computer ask the user for two number to calculate, then return the answer
# to have a program accept input from a user, we use the raw_input() function, Python automatically considers what the user types in as a string.

print("Please give me a number")
number1 = raw_input()             # here's our first variable

print("Please give me another number")
number2 = raw_input()             # here's our second variable

# We need to convert the value of the variables to a whole number, so Python can calculate the numbers
number1 = int(number1)
number2 = int(number2)

print("What operation would you like me to do with the two numbers?")
operation = raw_input()

# Below is our condition statements, or IF and THEN statements
# notice the indentations, these are called blocks of code
# anything that is indented under a statement, is part of that first statement

# checking if the input from the user is addition
if operation == "+":
  answer = number1 + number2

# checking if the input from the user is subtraction
elif operation == "-":
  answer = number1 - number2

# checking if the input from the user is multiplication
elif operation == "*":
  answer = number1 - number2
  
# checking if the input from the user is division
elif operation == "/":
  answer = number1 / number2
  
# Now, to print the answer
print(answer)

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# To make this a more interesting program, let's have Python "draw" out the answer!
# To do this, we import the module, turtle
# a module is just a program already written. We can use functions inside that program in our own, once we import it

import turtle
t = turtle.Turtle()
print("Please give me a number")
number1 = raw_input()             

print("Please give me another number")
number2 = raw_input()             

number1 = int(number1)
number2 = int(number2)

print("What operation would you like me to do with the two numbers?")
operation = raw_input()

if operation == "+":
  answer = number1 + number2

elif operation == "-":
  answer = number1 - number2

elif operation == "*":
  answer = number1 - number2
  
elif operation == "/":
  answer = number1 / number2
  
# To have 'turtle' draw out the answer, we just use a couple functions from the turtle program:
t.write(answer, font = (None, 40, "bold"))
turtle.done()

# Once we run this program, turtle will draw out whatever the answer is in a separate window!