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mathjs evaluate expression

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barisx answered on March 3, 2023 Popularity 9/10 Helpfulness 4/10

answer mathjs evaluate expression

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mathjs evaluate expression

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mathjs evaluate expression

// create a parser
const parser = math.parser()

// evaluate expressions
parser.evaluate('sqrt(3^2 + 4^2)')      // 5
parser.evaluate('sqrt(-4)')             // 2i
parser.evaluate('2 inch to cm')         // 5.08 cm
parser.evaluate('cos(45 deg)')          // 0.7071067811865476

// define variables and functions
parser.evaluate('x = 7 / 2')            // 3.5
parser.evaluate('x + 3')                // 6.5
parser.evaluate('f(x, y) = x^y')        // f(x, y)
parser.evaluate('f(2, 3)')              // 8

// get and set variables and functions
const x = parser.get('x')               // x = 7
const f = parser.get('f')               // function
const g = f(3, 3)                       // g = 27
parser.set('h', 500)
parser.evaluate('h / 2')                // 250
parser.set('hello', function (name) {
    return 'hello, ' + name + '!'
})
parser.evaluate('hello("user")')        // "hello, user!"

// clear defined functions and variables
parser.clear()

you can do excel like operations

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: mathjs.org

Tags: evaluate expression javascript mathjs

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Contributed on Mar 03 2023

barisx

0 Answers Avg Quality 2/10

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math.evaluate js

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The math.evaluate() function in JavaScript is not a built-in function. However, there are several libraries and methods that allow you to evaluate mathematical expressions in JavaScript. Here are a few options:

1. eval() function: This function can evaluate a string as JavaScript code, including mathematical expressions. However, it's important to use eval() with caution, as it can pose security risks if used with untrusted input.

Example: eval('2 + 2') // returns 4

1. mathjs library: This is a popular JavaScript library for mathematical computations. It includes an evaluate() function that can parse and evaluate mathematical expressions.

Example: const math = require('mathjs'); math.evaluate('2 + 2') // returns 4

1. expression-eval library: This library provides a safe way to evaluate mathematical expressions, without using the eval() function.

Example: const { evaluate } = require('expression-eval'); evaluate('2 + 2') // returns 4

Remember always be carefull when evaluating user-inputted expressions, as they can pose security risks if not properly sanitized.

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript

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Contributed on May 14 2024

Gavin Dennett

0 Answers Avg Quality 2/10

mathjs evaluate expression

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