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Math & AlgebraGenerated accuracy model review: 2026-05-06
GCD & LCM accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- **GCD**: Found using the Euclidean algorithm. **LCM**: Calculated as (|A × B|) / GCD(A, B).
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Number A: 12
- Number B: 18
Expected outputs
- GCD: 6
- LCM: 36
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- This calculator is intended for whole-number inputs.
- Negative signs do not change the GCD or LCM magnitude because the formulas use absolute values.
- Non-integer or blank inputs return an invalid result instead of being rounded silently.
Unit handling
- Number A accepts numeric values.
- Number B accepts numeric values.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current gcd-lcm-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for GCD & LCM.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.