Calc provides editable sheets, cell selection, formula bar, sheet creation, and safe formulas for arithmetic, references, ranges, SUM, AVERAGE, MIN, MAX, and COUNT. CSV export reflects stored raw values.
Sheets, active cell, raw formulas, formats, zoom, search, and tab state persist with the workspace.
Cycles, division by zero, unknown names, invalid references, and type errors remain explicit spreadsheet errors. Unsupported office functions are never evaluated as JavaScript.
The parser tokenizes and evaluates a bounded grammar without eval or Function. Formula text never leaves the device.
Renderer tests cover precedence, right-associative powers, ranges, Unicode strings, cycles, error propagation, and JavaScript-injection attempts.