Square brackets and curly brackets in expressions?

[CharlieJV]

I'm thinking of adding the ability to use curly brackets and square brackets in expressions, along with parentheses, to make complex expressions easier to read.

But not if square brackets (i.e. [ and ] ) and curly brackets (i.e. { and } ) are used in any way as special characters in QB64pe.

Are square brackets and/or curly brackets used for any purpose in QB64pe?  (I haven't noticed any.)