Calculator
Evaluate arithmetic expressions with arbitrary-precision decimal math using big.js.
When to Use
- User asks to calculate or evaluate a math expression
- Precise decimal arithmetic is needed (avoids floating-point errors like
0.1 + 0.2 = 0.30000000000000004) - Expressions involve parentheses, operator precedence, or exponents
Supported Operations
| Operator | Description | Precedence | | -------- | ----------- | ---------- | | + | Addition | 1 | | - | Subtraction | 1 | | * | Multiplication | 2 | | / | Division | 2 | | ^ | Exponent (right-associative) | 3 | | () | Parentheses | Highest |
Usage
cd scripts
npm ci || npm install
npm run build
npm run calculate "<expression>"Examples
| Input | Output | | ----- | ------ | | "3 + 2" | 5 | | "10 / 4" | 2.5 | | "2 ^ 10" | 1024 | | "(2 + 3) 4" | 20 | | "1 + 4.5 (3-6) / 5" | -1.7 | | "-5 + 3" | -2 | | "2 ^ 3 ^ 2" | 512 (right-associative: 2^9) |
Edge Cases
- Empty expression: Throws "Empty expression" error
- Mismatched parentheses: Throws "Mismatched parentheses" error
- Division by zero: big.js throws an error
- Exponent must be integer: big.js
.pow()requires integer exponents
Limitations
- No trigonometric functions (sin, cos, tan)
- No variables or symbolic math
- Exponents must be integers
- No factorial, modulo, or bitwise operators