title: How do I break our a def() loop and onto the next code?
body: <p>I'm trying to break out of the def Converter loop and then onto my next code. I have tried return but it doesn't work. Break gives me a syntax error. Please edit the code directly since i'm really bad at imputing foreign code. This is python 3.
  Many Thanks</p>
  
  <pre><code>from turtle import Screen, Turtle
  
  print("Please select your conversion:")
  
  invalid_input = True
  def Converter() :
    conversion = input ("metric to metric type mm, metric to imperial type mi, units of water type w, for physics equations type p, for math equations type m and for quick facts type q:")
    print("Please select your conversion:")
  
    if conversion == "mm":
      #selection = "metric to metric conversions!"
      invalid_input = False
    elif conversion == "mi":
      selection = "metric to imperial conversions!"
      invalid_input = False
    elif conversion == "w":
      selection = "water conversions!"
      invalid_input = False
    elif conversion == "p":
      selection = "physics equations!"
      invalid_input = False
    elif conversion == "m":
      selection = "maths equations!"
      invalid_input = False
      print("You have selected", selection + "!")
    elif conversion == "q":
      selection = "quick facts!"
      invalid_input = False
    else:
      print("\n")
      print("Invalid! Please try again.\n \n \n")
  while invalid_input : 
    Converter()
  
  print("\n")
  print("You have selected", selection + "!")
  
  invalid_input = True
  def start() :
    decision = input ("Is this correct? If correct type y, if incorrect type n.")
    if decision == "y":
          #stuff
          invalid_input = False
  while invalid_input : True# this will loop until invalid_input is set to be True
  start()
  </code></pre>