// control.asm:	WORD p_begin,'BEGIN',fasm

anchor:p_begin[]

=== Word: BEGIN

....
Data stack: Compiling: ( a 0 * -- )
....

"END" is an immediate function word that is used together with
<<p_begin,BEGIN>>, <<p_ifbreak,IFBREAK>> and <<p_ifagain,IFAGAIN>> to
implement structured execution control. END processes the data stack
to resolve any dangling <<p_ifbreak,IFBREAK>> branch offset for the
block of the matching <<p_begin,BEGIN>>.