rab

# frozen_string_literal: true
def get_input(prompt = '--> ')
  puts ''
  puts 'Please enter a number, odd or even.'
  print prompt
  # if the end-of-input was reached and gets returned a nil
  # or the word 'exit' or 'quit' appears (ignoring case) in the input
  if (input = gets).nil? || /exit|quit/i =~ input
    nil                         # just return a nil
  else