COBOL's PERFORM statement has some surprising functionality for anyone not familiar with the language. See if you can solve the puzzle and avoid the landmine.

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COBOL's PERFORM statement can lead to unexpected behavior in program control flow, especially when combined with GOTO statements. By creating a control block structure that resembles a stack, the language manages execution paths intricately. An example illustrates how COBOL's flow can be disrupted, demonstrating the challenge in accurately analyzing COBOL code due to hidden state persistence, impacting code parsing and understanding.

The hidden landmine in COBOL’s PERFORM statement: a control flow puzzle

COBOL’s PERFORM Statement for Non-COBOL Programmers

Technical Implementation Details: How PERFORM Actually Works

Accurate Analysis of COBOL code is Complex