Rich kids are into COBOL

Chuck Guzis cclist at sydex.com
Wed Feb 18 10:50:44 CST 2015


Is there any other language (save PL/I for obvious reasons) that has an 
equivalent to the COBOL PERFORM...THRU statement?

That one always struck me as being a bit offbeat.  Example: Consider a 
section of a program with 4 consecutive paragraphs, named PARA-1 through 
PARA-4.  One can say in the same program:

PERFORM PARA-1 23 TIMES.
PERFORM PARA-1 THRU PARA-4.
PERFORM PARA-1 THRU PARA-2.
PERFORM PARA-2 THRU PARA-3 WITH TEST AFTER VARYING INDEX-1 FROM 10 BY 3 
UNTIL FLAG-1 > 0.

It's that variable scope of a PERFORM that I don't recall seeing in any 
other language.

--CHuck





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