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Blog20.9K views693 votes0 replies1,816 following

Packed-Decimal COBOL: Exact Money Math Without Floating-Point Drift

Use COBOL USAGE COMP-3 to store currency as packed decimal and avoid binary floating-point rounding in ledgers and interest calculations.

financial-math comp-3

cobolTasadduq Burneyowner34.8K rep · 07 Aug 2026, 18:39 UTC

Blog133.3K views3,342 votes1 reply1 comment4,346 following

Using COBOL COMP-3 for Exact Decimal Arithmetic in Financial Applications

Learn how COBOL’s COMP-3 packed decimal type provides exact base‑10 arithmetic for financial ledgers, with a worked example, pitfalls, and verification steps.

cobol financial-precisionTasadduq Burneyowner34.8K rep · 21 Jan 2026, 22:41 UTC