When using For each … Until, the loop stops as soon as the condition becomes true.

Unlike For each … While, the iterator does not move to the next element before stopping.
The loop variable keeps the value of the element that caused the stop.

As a result:

• If the condition becomes true in the middle of the collection, the loop stops on that element.
• If the condition becomes true on the last element, the loop also stops on that last element.

Example:

$col := New collection(10; 20; 30; 40) For each ($v; $col) until ($v=30)   //Processing End for each

When exiting the loop, $v still contains 30, unlike For each … While, where it would contain 40.
This makes For each … Until preferable when you need to know exactly which element caused the loop to stop.