vbarredp
VBARREDP char
VBARRED? char
BACKSLASHEDP char (library procedure)
BACKSLASHEDP char (library procedure)
BACKSLASHED? char (library procedure)
outputs TRUE if the input character was originally entered into Logo
within vertical bars (|) to prevent its usual special syntactic
meaning, FALSE otherwise. (Outputs TRUE only if the character is a
backslashed space, tab, newline, or one of ()[]+-*/=<>":;\~?| )
The names BACKSLASHEDP and BACKSLASHED? are included in the Logo
library for backward compatibility with the former names of this
primitive, although it does *not* output TRUE for characters
originally entered with backslashes.