loops.rb

5.times do |i|                              for (var i = 0; i < 5; i++) {
  puts "howdy #{i}"                           alert("howdy " + i.toString());
end                                         };

(10..20).step(2) do |i|                     for (var i = 10; i <= 20; i = i + 2) {
  puts "howdy #{i}"                           alert("howdy " + i.toString());
end                                         };

a = ["apple", "orange", "banana"]           var a = ["apple", "orange", "banana"];
a.each do |fruit|                           for (var i = 0; i < a.length; i++) {
  puts "My favorite fruit: #{fruit}"          alert("My favorite fruit: " + a[i]);
end                                         };

rosetta.rb

def say_weather             function sayWeather() {
  temp = "72 degrees"         var temp = "72 degrees";
  puts "It is " + temp        alert("It is " + temp);
end                         };

def say_weather(temp)       function sayWeather(temp) {
  puts "It is " + temp        alert("It is " + temp);
end                         };

do |temp|                   function(temp) {
  puts "It is " + temp        alert("It is " + temp);
end                         };