Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third Edition

Exercise 35. Branches and Functions

You have learned if-statements, functions, and arrays. Now it’s time to bend your mind. Type this in, and see if you can figure out what it’s doing.

ex35.rb

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 1    def gold_room  2      puts "This room is full of gold. How much do you take?"  3  4      print "> "  5      choice = $stdin.gets.chomp  6  7      # this line has a bug, so fix it  8      if choice.include? ("0") || choice.include? ("1")  9        how_much = choice.to_i 10      else 11        dead("Man, learn to type a number.") 12      end 13 14      if how_much < 50 15        puts "Nice, you're not greedy, you win!" 16        exit(0) 17      else 18        dead("You greedy bastard!") 19      end 20    end 21 22 23     ...