A "variable" of this type allows you to evaluate a rexx expression, without using a separate #evaluate command. Each time you use it a relatively slow rexx "interpret" command is required, so for performance reasons it is recommended that you:
The rexx expression has the limitation that it must not contain the ">" character!
This is a Standard Definition which always exists (you don't need to #define it). Note that you can create your own variations or completely new ones (see the examples).
;--- 5 '*' chars ----
<?=copies('*',2)||copies('*',3)>
;--- Next line is invalid (compile will fail) ---
<?=copies('*',2)||copies('>',3)>