title: Python3.x: If/Else trouble
body: <p>I'm having some trouble with my if/else statements. Here's my code, the question is described in a multi-line comment in the code itself:</p>
  
  <pre><code>def cube(*number):
      return number**3
  def by_three(number):
      if number/3==0: #Checks if number is divisible by 3.
          cube_of=cube(number) #Cubes number.
          print(cube_of) #Prints cube of number.
          return False
      else:
          print("Your number isn't divisible by three. Try again.") #Comment is below
          """
          Tells if number is not divisible by three. If I give 9 as the argument, 
          this block is executed. Why so?
          """
          return True
  while True:
      by_three(int(input("Give me any number divisible by three: ")))
  </code></pre>
  
  <p>The question is in the code. Please use simple terms in your answers as I am only a beginner.</p>