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HELP ELSEUNLESS Steven Hardy Mar 1982 This introduces a second condition in an -if- or -unless- statement. The statement elseunless <CONDITION> then is completely equivalent to: elseif not(<CONDITION>) then For example: if <CONDITION1> then <ACTION1> elseunless <CONDITION2> then <ACTION2> else <ACTION3> endif When the POP-11 system executes this -if- statement it first tests <CONDITION1>. Unless it evaluates to -false- <ACTION1> is performed. If <CONDITION1> is -false-, then <CONDITION2> is tested; if this is -false- then <ACTION2> is performed, otherwise <ACTION3> is performed. Also see: *IF --- Summary of -if- statement usage *ELSEIF --- The use of -elseif- in conditionals *UNLESS --- Summary of -unless- statement usage *CONDITIONALS --- Summary of conditional statements *BOOLEAN --- Boolean values in POP-11 REF *SYNTAX *POPSYNTAX Summary of POP-11 syntax --- C.all/help/elseunless --- Copyright University of Sussex 1992. All rights reserved. ----------