title: Dice game query While loop
body: <p>I am trying to create a dice game using a while loop and if's. I have done this successfully however I am trying to figure out how to program the game so that if numbers 4,6 or 12 are not input it will state invalid choice and will ask diceChoice again. 
  Can anybody help?</p>
  
  <p>So far I have...</p>
  
  <pre><code>rollAgain = "Yes" or "yes" or "y"
  
  while rollAgain == "Yes" or "yes" or "y":
      diceChoice = input ("Which dice would you like to roll; 4 sided, 6, sided or 12 sided?")
      if diceChoice == "4":
          import random 
          print("You rolled a ", random.randint(1,4)) 
      if diceChoice == "6":
          import random
          print("You rolled a ", random.randint(1,6))
      if diceChoice == "12":
          import random
          print("You rolled a ", random.randint(1,12))
  
      rollAgain = input ("Roll Again?") 
  print ("Thank you for playing")
  </code></pre>