@fav/math.log10

Calculates the base 10 logarithm of a number.

This program is made referring to this article about Math.log10 of MDN web docs.

"fav" is an abbreviation of "favorite" and also the acronym of "for all versions". This package is intended to support all Node.js versions and many browsers as possible. At least, this package supports Node.js >= v0.10 and major Web browsers: Chrome, Firefox, IE11, Edge, Vivaldi and Safari.

Install

To install from npm:

$ npm install --save @fav/math.log10

NOTE: npm < 2.7.0 does not support scoped package, but old version Node.js supports it. So when you use such older npm, you should download this package from github.com, and move it in node_modules/@fav/math.log10/ directory manually.

Usage

For Node.js:

var log10 = require('@fav/math.log10');

Math.log10(2);      // => 0.3010299956639812
Math.log10(1);      // => 0
Math.log10(0);      // => -Infinity
Math.log10(-2);     // => NaN
Math.log10(100000); // => 5

For Web browsers:

<script src="fav.math.log10.min.js"></script>
<script>
var log10 = fav.math.log10;
log10(2);  // => 0.3010299956639812
</script>

API

log10(x) : number

Calculates the base 10 logarithm of a number.

Parameters:

| Parameter | Type | Description | |:----------|:------:|:------------------------------------| | x | number | A number. |

Returns:

The base 10 logarithm of the given number. If the number is negative, NaN is returned.

Checked

Node.js (11〜)

| Platform | 11 | |:---------:|:------:| | macOS |◯| | Windows10 |◯| | Linux |◯|

Node.js (4〜10)

| Platform | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |:---------:|:------:|:------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|◯|◯|

io.js (1〜3)

| Platform | 1 | 2 | 3 | |:---------:|:------:|:------:|:------:| | macOS |◯|◯|◯| | Windows10 |◯|◯|◯| | Linux |◯|◯|◯|

Node.js (〜0.12)

| Platform | 0.8 | 0.9 | 0.10 | 0.11 | 0.12 | |:---------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|

Web browsers

| Platform | Chrome | Firefox | Vivaldi | Safari | Edge | IE11 | |:---------:|:------:|:-------:|:-------:|:------:|:------:|:------:| | macOS |◯|◯ |◯ |◯| -- | -- | | Windows10 |◯|◯ |◯ | -- |◯|◯| | Linux |◯|◯ |◯ | -- | -- | -- |

License

Copyright (C) 2018 Takayuki Sato

This program is free software under MIT License. See the file LICENSE in this distribution for more details.