CalculatorLife

A: The calculator is based on the Math.js library and supports basic arithmetic operations (+, -, *, /), parentheses, decimal operations, and common mathematical functions such as sqrt (square root), sin, cos, tan (trigonometric functions), log (logarithm), abs (absolute value), etc. For example: sqrt(16) returns 4, sin(0) returns 0.

A: You can directly enter complete mathematical expressions in the input field, supporting multi-level nested parentheses. For example: (2 + 3) * (4 - 1) or sqrt(16) + 2^3. You can also use keyboard number keys and operator keys for quick input.

A: Click the base switcher (DEC/BIN/HEX) in the top-left corner of the display area to select the desired base. Calculation results automatically convert to the corresponding base display. For example, decimal 255 displays as 0b11111111 in binary and 0xFF in hexadecimal. Note: Input still requires decimal numbers.

A: History is saved in browser local storage (localStorage) and persists until you manually clear it or clear browser data. Up to 50 recent calculation records are saved; older records are automatically deleted when exceeded.

A: JavaScript floating-point arithmetic may have precision issues, for example, 0.1 + 0.2 may not equal 0.3. The Math.js library has optimized most precision issues, but for high-precision financial calculations, we recommend using a professional financial calculator or scientific calculator.

A: Completely secure. All calculations are performed locally in your browser, data is never uploaded to servers, completely offline processing. History is also saved only on your device.

A: Yes. You can directly use the keyboard to enter numbers, operators, and parentheses in the input field. Pressing Enter is equivalent to clicking the equals button and saves the current calculation to history. You can also use Backspace to delete characters.