program2.rb

if (5+5 == 10)
  puts "this is true"
else
  puts "this is false"
end

program3.rb

def choose
  puts "Do you like programming? Yes, no, or maybe please."
  choice = gets.chomp
  
  case choice.downcase
  when "yes"
    puts "That\'s great!"
  when "no"
    puts "That\'s too bad!"
  when "maybe"
    puts "Glad you are giving it a chance!"
  else
    puts "I have no idea what that means."
  end
end

choose

program4.rb

(0..10).each do |n|
  p "the new number is #{n}"
end