dimension m.sqrt[1]

sqrt = "meow"

? sqrt[1]
: 1,00

? m.sqrt[1]
: meow

Normally you never need to m. arrays except when you want to pass them by reference to user-defined functions (ALEN() etc. are okay without m.) but if the array has the same name as a builtin function then the array needs to be emmed. This is probably because of name scoping (builtin names are always found first).

No, before I started this reply I did not know that square brackets can be used in function calls as well as in arrays ...

? iif[.f., 1, 2]
: 2