Post #1
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Sam
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Joined: Jul 1, 2026, 2:30 PM
Posted: Jul 25, 2026, 9:34 AM
Keep seeing PERFORM 1000-INIT THRU 1000-EXIT. Why not just PERFORM 1000-INIT?
Thread: COBOL
What does PERFORM THRU mean?
Started by Sam • user3 replies190 viewsLast activity 2 weeks ago
Post #2
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Marty
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Joined: Aug 12, 2024, 9:14 AM
Posted: Jul 25, 2026, 12:34 PM
THRU runs from the first paragraph through the last one named, in source order. Old style wrapped a bunch of paragraphs as one unit ending at an EXIT paragraph.
Newer code often just PERFORM 1000-INIT with everything inside one paragraph or section. Both exist in the wild.
Post #3
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Rick
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Joined: Jun 14, 2024, 9:41 AM
Posted: Jul 26, 2026, 11:34 AM
Watch GO TOs jumping out of a THRU range. That is how you get "fell through into the next paragraph" bugs.
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