// control.asm: WORD p_then,'THEN',fasm anchor:p_then[] === Word: THEN .... Data stack: Compiling: ( a -- ) .... "THEN" is an immediate function word that is used together with <> and <> to implement structured execution control. THEN performs the branch resolution for the stacked address which pinpoints the foot address the branch offset to resolve, so that at execution time there is an appropriate conditional branch past the "then-part" or the "else-part" of the "structured statement".