Learn to Program, 2nd Edition

One More Example

I think another example method would be helpful here. We’ll call this one english_number. It will take a number, like 22, and return the English version of it (in this case, the string 'twenty-two'). For now, let’s have it work only on integers from 0 to 100:

def english_number number
  #  We accept numbers from 0 to 100.
  if number < 0
    return 'Please enter a number zero or greater.'
  end
  if number > 100
    return 'Please enter a number 100 or less.'
  end
  num_string = ''  #  This is the string we will return.
  #  "left"  is how much of the number
  #          we still have left to write out.
  #  "write" is the part we are
  #          writing out right now.
  #  write and left... get it?  :)
  left  = number
  write = left/100          # How many ...