22 lines
526 B
Markdown
22 lines
526 B
Markdown
---
|
|
title: Approximate number equality
|
|
tags: math
|
|
cover: engine
|
|
firstSeen: 2018-02-14T12:47:13+02:00
|
|
lastUpdated: 2020-11-01T20:50:57+02:00
|
|
---
|
|
|
|
Checks if two numbers are approximately equal to each other.
|
|
|
|
- Use `Math.abs()` to compare the absolute difference of the two values to `epsilon`.
|
|
- Omit the third argument, `epsilon`, to use a default value of `0.001`.
|
|
|
|
```js
|
|
const approximatelyEqual = (v1, v2, epsilon = 0.001) =>
|
|
Math.abs(v1 - v2) < epsilon;
|
|
```
|
|
|
|
```js
|
|
approximatelyEqual(Math.PI / 2.0, 1.5708); // true
|
|
```
|