Ruby on Rails : For / While / Do While / Switch

Method	Example Code	Output
For Loop	<% for i in 0..9 %> Result: <%= i %>, <% end %>	Result: 0,1,2,3,4,5,6,7,8,9
	<% @people = Person.find(:all) %> <% for i in 0...@person.length %> Result: <%= @person[i].name %>, <% end %>	Result: John,Peter,Sharon
	<% @people = Person.find(:all) %> <% for person in @people %> Result: <%= @person.name %>, <% end %>	Result: John,Peter,Sharon
While Loop	<% i = 0 %> <% while( i < 10 ) %> Result: <%= i %>, <% i+= 1 %> <% end %>	Result: 0,1,2,3,4,5,6,7,8,9
Do While Loop	<% i = 5 %> <% begin %> Result: <%= i %>, <% i+= 1 %> <% end while( i < 10 ) %>	Result: 5,6,7,8,9
Switch Statement	<% foo = 5 %> <% case foo %> <% when 1 %>    Foo is equal to 1 <% when 2..9 %>    Foo is between 2 and 9 <% when 10 %>    Foo is equal to 10 <% end %>	Foo is between 2 and 9