title: How can I convert a string to an int in Python?
body: <p>The output I'm getting for my little example app is the following:</p>
  
  <pre><code>Welcome to the Calculator!
  Please choose what you'd like to do:
  0: Addition
  1: Subtraction
  2: Multiplication
  3: Division
  4: Quit Application
  0
  Enter your first number: 1
  Enter your second number: 1
  Your result is:
  11
  </code></pre>
  
  <p>This is because the addition() method is taking the input() as strings and not numbers. How can I use them as numbers?</p>
  
  <p>Here is my entire script:</p>
  
  <pre><code>def addition(a, b):
      return a + b
  
  def subtraction(a, b):
      return a - b
  
  def multiplication(a, b):
      return a * b
  
  def division(a, b):
      return a / b
  
  keepProgramRunning = True
  
  print "Welcome to the Calculator!"
  
  while keepProgramRunning:    
      print "Please choose what you'd like to do:"
  
      print "0: Addition"
      print "1: Subtraction"
      print "2: Multiplication"
      print "3: Division"
      print "4: Quit Application"
  
  
  
      #Capture the menu choice.
      choice = raw_input()    
  
      if choice == "0":
          numberA = raw_input("Enter your first number: ")
          numberB = raw_input("Enter your second number: ")
          print "Your result is:"
          print addition(numberA, numberB)
      elif choice == "1":
          numberA = raw_input("Enter your first number: ")
          numberB = raw_input("Enter your second number: ")
          print "Your result is:"
          print subtraction(numberA, numberB)
      elif choice == "2":
          numberA = raw_input("Enter your first number: ")
          numberB = raw_input("Enter your second number: ")
          print "Your result is:"
          print multiplication(numberA, numberB)
      elif choice == "3":
          numberA = raw_input("Enter your first number: ")
          numberB = raw_input("Enter your second number: ")
          print "Your result is:"
          print division(numberA, numberB)
      elif choice == "4":
          print "Bye!"
          keepProgramRunning = False
      else:
          print "Please choose a valid option."
          print "\n"
  </code></pre>