When Statement

The when statement is vehemently similar to the until statement. It's simply the direct opposite.

Looping until 'condition' is true, the old way.

repeat    until not <condition>

Looping until 'condition' is true, the new way.

repeatwhen <condition>

This syntax is more readable. It's not any faster, but it's the Lua semantic of do .. while from other languages.

Using Compatibility Mode?

You may need to use pluto_when instead of when.