Scientific Calculator

This tool performs core arithmetic and basic scientific calculations in a browser. It accepts a math expression or separate operands and operators, applying standard operator precedence and parentheses handling to yield a precise result. Conceptually, the engine tokenizes the input, converts infix expressions to a reversible form, and evaluates using a stack-based approach to ensure correct ordering. It supports +, -, *, /, ^, and % with parentheses, enabling complex expressions such as (3 + 4) * (5 - 2)^2 for rapid verification. Optional advanced functions can be enabled to extend capabilities, but the default focus remains on reliable, predictable numeric results. The system emphasizes robust error handling: unbalanced parentheses, invalid tokens, or divide-by-zero produce clear errors without partial results. Outputs are formatted with up to 12 significant digits, adapting to integer or decimal forms depending on the result. This makes it suitable for quick checks in classrooms, laboratories, engineering calculations, and financial planning drafts, where accurate, repeatable results are critical. The tool intentionally excludes unit conversions and graphing to maintain a focused calculation core, aligning with typical Casio-style calculator behavior. Localization defaults to US numeric formatting but can adapt to other locales if required. This combination of parser reliability, precise numeric output, and configurable feature sets provides a dependable, scalable arithmetic solution for both education and professional contexts.