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YouTubeTopictrick
COBOL OPEN vs CLOSE: File Handling Quick Reference
COBOL OPEN and CLOSE statements control when files become available and when buffered data is safely written. Learn INPUT, OUTPUT, EXTEND, and I-O modes, including the OUTPUT mistake that can erase an existing file. Chapters: 0:00 OPEN and CLOSE 0:09 OPEN unlocks a file 0:34 Choose the right mode 0:44 INPUT vs OUTPUT 1:08 EXTEND prevents data ...
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