Loop

1. loop

   number = 0
   loop do
     break if number > 15
     puts "The number is #{number}"
     number += 1
   end
   

2. until

   until number > 30
     puts "The number is #{number}"
     number += 1
   end
   

3. while

   while number < 40 do
     puts "The number is #{number}"
     number += 1
   end
   

4. for

   for i in 1..8 do
      puts i
   end
   

5. times

   16.times do |number|
     puts "The number is #{number}"
   end
   

6. times oneliner

   5.times { |i| puts i }
   

7. upto

   5.upto 10 do
     puts 'Hi'
   end
   

8. downto

   15.downto(10) {|i| puts i }
   

9. each

   list = [0, 1, 2, 3, 4]
   list.each do |number|
     puts "The number inside the loop is #{number}"
   end
   

10. each without initializing list

    (0..15).each do |number|
      puts "The number inside the loop is #{number}"
    end
    

11. for another form

    for number in 0..15
      puts "The number inside the loop is #{number}"
    end
    

請 牛人 現身, 繼續增加方法!