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mathjs

Precise number calculation function that solves JavaScript floating-point precision issues, supports chaining.

API

mathjs

Return

Argument Description Type
ComputeNumberResult Calculation result object { result: number, next: Function }

Parameters

Parameter Description Type Default
a First number number Required
type Operation type (+, -, *, /) string Required
b Second number number Required

ComputeNumberResult

Property Description Type
result Calculation result number
next Function to continue calculation Function

Example

Basic Usage

import { mathjs } from 'ranuts';

const result = mathjs(0.1, '+', 0.2);
console.log(result.result); // 0.3 (precise result, not 0.30000000000000004)

Chaining

import { mathjs } from 'ranuts';

const result = mathjs(1.3, '-', 1.2).next('+', 1.5).next('*', 2.3).next('/', 0.2);
console.log(result.result); // Precise calculation result

Solve Precision Issues

import { mathjs } from 'ranuts';

// Native JavaScript calculation has precision issues
console.log(0.1 + 0.2); // 0.30000000000000004

// Using mathjs gets precise result
const result = mathjs(0.1, '+', 0.2);
console.log(result.result); // 0.3

Complex Calculation

import { mathjs } from 'ranuts';

const total = mathjs(100, '*', 0.1).next('+', 50).next('-', 20).next('/', 2);
console.log(total.result); // Precise calculation result

Notes

  1. Precision handling: Automatically handles floating-point precision issues, avoiding 0.1 + 0.2 !== 0.3 problems.
  2. Chaining: Supports chained calculations through the next method.
  3. Operation types: Supports four operations: + (add), - (subtract), * (multiply), / (divide).
  4. Performance: Slightly slower than native operations, but guarantees precision.