Guess my number game

guessing_game.rb

# Play with `ruby guessing_game.rb`

require 'securerandom'

def next_guess
  @guess = STDIN.gets.to_i

  # Validate input
  next_guess unless @guess >= 1 && @guess <= 100_000

  @number_of_guesses += 1

  # Evaluate guess
  if @guess > @number
    puts "Lower."
    next_guess
  elsif @guess < @number
    puts "Higher."
    next_guess
  elsif @guess == @number
    duration_in_seconds = (Time.now - @start_time).to_i
    puts "You've done it!"
    puts "I picked #{@number}, and you've found it in #{duration_in_seconds} seconds with #{@number_of_guesses} guesses."
    puts "Well done!"
  end
end

puts "Guessing a number between 1 and 100,000. How fast can you guess it?"

@number = SecureRandom.random_number(100_000) + 1
@start_time = Time.now
@number_of_guesses = 0

next_guess