Editing Generator (computer programming) (section)

===XL===
In [[XL (programming language)|XL]], iterators are the basis of 'for' loops:

<syntaxhighlight lang="text">
import IO = XL.UI.CONSOLE

iterator IntegerIterator (var out Counter : integer; Low, High : integer) written Counter in Low..High is
    Counter := Low
    while Counter <= High loop
        yield
        Counter += 1

// Note that I needs not be declared, because declared 'var out' in the iterator
// An implicit declaration of I as an integer is therefore made here
for I in 1..5 loop
    IO.WriteLn "I=", I
</syntaxhighlight>