From: Rick Barrett <chngth3wrld@...>
Date: 2009-11-04T15:50:20+09:00
Subject: Why do I keep getting "nil"?

I had a homework assignment where I had to create a number guessing game
using custom methods. I got it to work...but after some lines it'll put
"nil" on the next line and continue with the program.

ex. after an input

Please enter a number.
4
nil
Too low. Try again.
Please enter a number.
7
nil
Too low. Try again.

or after a generated line

You guessed the secret number in X tries!
nil

Why is it saying "nil" everywhere and how do I stop it?

My code is below if that helps...






# Methods ######################
def get_user_name()
  puts "What is your name?"
  name = gets().chomp().capitalize()
end

def num_eval(guess, number)

  if (guess > 100)
    puts "That's more than 100! Pick a number between 1 and 100!"
  elsif (guess < 1)
    puts "That's less than 1! Pick a number between 1 and 100!"
  elsif (guess > number)
    puts "Too high! Try again!"
  elsif (guess < number)
    puts "Too low! Try again!"
  end
end

def get_user_guess(number)

  guess = 0
  num_guess = 0

  while (guess != number) do
    puts "Please enter a number."
    guess = gets().chomp().to_i()
    puts num_eval(guess, number)

    num_guess = num_guess + 1
  end

  puts "Congrats you won!"
  puts "You guessed the secret number in " + num_guess.to_s() + "
tries!"

end

# Variables ####################
play_game = "yes"
magic_number = 0
num_guesses = 0
num_round = 1
guess = 0

puts "Welcome to the guessing game!\n"
name = get_user_name
puts "Hi, " + name + "!"
puts "You job is to guess the number between 1 and 100"
puts "I will tell you if your guess is correct, too low or too high."

while (play_game.downcase() == "yes") do
  puts "Time for Round " + num_round.to_s() + "!"
  magic_number = rand(100) + 1
  puts magic_number

  puts get_user_guess(magic_number)

  puts "Would you like to play again?"
  play_game = gets().chomp()

  num_round = num_round + 1
end

puts "\nThank you for playing the Ruby Guessing Game, " + name + "!
Good-bye!"
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