I was wondering how many different ways can you write loop in ruby.

The first and most common has to be the loop keyword: 1. Loop ruby placeholder = 0 loop do break if placeholder > 5 puts "Inside the loop: #{placeholder}" placeholder += 1 end

1. The for loop (Coming from a C like programming languages, I have to say this is the most common one people uses) ruby for i in 1..5 do puts i end

2. While loop is pretty common in C like languages. ruby placeholder = 0 while placeholder < 5 do puts "Inside the while loop: #{placeholder}" placeholder += 1 end

3. Until, for me works like a reverse while loop (the direct opposite). ruby until placeholder > 5 puts "Inside the until: #{placeholder}" placeholder += 1 end

4. Times ruby 5.times { |x| puts x}

5. Times, doing it with block. ruby placeholder = "Hello there"; 5 times do |placeholder| puts "Inside the time loop: #{placeholder}"

6. Each ruby array = [1, 3, 5, 7, 9] array.each do |x| puts "Inside the each loop: #{x}" end

7. UpTo (You can also use downto) ruby 1.upto 5 do puts "Hello there" end

The author once said:

Ruby inherited the Perl philosophy of having more than one way to do the same thing. I inherited that philosophy from Larry Wall, who is my hero actually. I want to make Ruby users free. I want to give them the freedom to choose. -- Yukihiro Matsumoto

Maybe thats why there's so many different way to write loops, just use one that you like, there's no right or wrong answer.