Here's the formal specification for the while loop:


while condition [ do | : ]
  code
end

1.	The while Loop
2.	Another form you can use is with begin/end
3.	The while loop executes its contained code while a condition that you specify remains true.
4.	While loop with array length
5.	loop code based on the result of a comparison made on each loop
6.	use while loop to convert elements in an array to capitalized case
7.	Replace one array with another

Here's the formal specification for the while loop: : while « Statement « Ruby