LibCalculator #

A mathematical expression evaluator for Dart that handles arithmetic operations with proper precedence rules.

Features #

• Evaluates mathematical expressions with support for:
  • Basic arithmetic operations (+, -, *, /)
  • Parentheses for expression grouping
  • Decimal numbers
  • Proper operator precedence
• Clean error handling for invalid expressions
• Automatic result formatting (integers or decimals)
• Precise calculations with rounding to 10 decimal places

Getting started #

Add this package to your project's dependencies:

dependencies:
  libcalculator: ^1.2.0

Then run:

dart pub get

Usage #

Simple usage example:

import 'package:libcalculator/libcalculator.dart';

void main() {
  final calculator = Calculator();

  // Basic arithmetic
  print(calculator.calculate('2 + 3'));  // Output: 5

  // Expression with parentheses
  print(calculator.calculate('2 * (3 + 4)'));  // Output: 14

  // Decimal numbers
  print(calculator.calculate('10 / 3'));  // Output: 3.3333333333

  // Complex expressions
  print(calculator.calculate('(2.5 + 3.5) * (4 - 1) / 2'));  // Output: 9
}