Here’s logic how to use PERFORM UNTIL. We use PERFORM statement for handling loops in COBOL. Here, this example shows PERFORM with UNTIL.
PERFORM Varying Until Syntax
PERFORM paragraph-name
VARYING a-variable-value
FROM start-value BY increment-value
UNTIL some-condition-is-met
PERFORM Varying UNTIL Example
PERFORM PARA-A
VARYING TEST-1
FROM 1 BY 1
UNTIL TEST-1 > 1000
OR FILE-SWITCH = 'EOF'
Bonus Post
COBOL: How to use PERFORM-TEST-AFTER Logic
You can use this COBOL logic written using PERFORM TEST AFTER. This is one best way of handling loops in COBOL programs. After reading input files you need to validate each record. So this logic helps you as a guide.
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