NOP

Purpose

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>>-NOP--;------------------------------------------------------><

NOP is a dummy instruction that has no effect. It can be useful as the target of a THEN or ELSE clause:
Example:
Select
   when a=c then nop           /* Do nothing */
   when a>c then say 'A > C'
   otherwise     say 'A < C'
end
Note: Putting an extra semicolon instead of the NOP would merely insert a null clause, which would be ignored. The second WHEN clause would be seen as the first instruction expected after the THEN, and would, therefore, be treated as a syntax error. NOP is a true instruction, however, and is, therefore, a valid target for the THEN clause.

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Timestamp icon Last updated: Tuesday, 7 January 2014


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