math-expression-evaluator

What is math-expression-evaluator?

The math-expression-evaluator is an npm package that allows for parsing and evaluating mathematical expressions. It can handle various mathematical operations, including basic arithmetic, logical operations, and functions.

What are math-expression-evaluator's main functionalities?

Evaluating Mathematical Expressions

This feature allows for the evaluation of a string-based mathematical expression, including support for functions like square root.

var mexp = require('math-expression-evaluator');
var result = mexp.eval('2+3*sqrt(4)');

Support for Variables in Expressions

This feature enables the evaluation of expressions with variables, where the values of the variables can be provided as an object.

var mexp = require('math-expression-evaluator');
var result = mexp.eval('x^2 + y', {x: 3, y: 4});

Custom Functions

This feature allows users to add custom functions to the evaluator, which can then be used in expressions.

var mexp = require('math-expression-evaluator');
mexp.addToken([
  {type: 3, token: 'sum', show: 'sum', value: function(a, b) { return a + b; }}
]);
var result = mexp.eval('sum(1,2)');

Logical Operations

This feature supports logical operations within expressions, enabling the evaluation of expressions that include logical comparisons.

var mexp = require('math-expression-evaluator');
var result = mexp.eval('1 < 2 && 3 > 2');

Other packages similar to math-expression-evaluator

mathjs

Math.js is an extensive math library for JavaScript and Node.js. It provides a wide range of features including support for units, complex numbers, matrices, and a large number of mathematical functions. Math.js is more feature-rich and can be considered more advanced than math-expression-evaluator.

algebra.js

Algebra.js allows you to define algebraic expressions and equations and perform operations on them. It is more focused on algebraic structures like fractions and equations compared to math-expression-evaluator, which is more about evaluating general mathematical expressions.

nerdamer

Nerdamer is a JavaScript library for symbolic mathematics. It is capable of handling symbolic expressions, calculus, algebra, and solving equations. Nerdamer provides more advanced features for symbolic computation compared to math-expression-evaluator.

README

Introduction

A simple but efficient evaluator for Math expression using Javascript

Installation

Node JS

Using npm

npm install math-expression-evaluator

Browser

Using bower

bower install math-expression-evaluator

Test

npm test

#Documentation