Package Exports

is-natural-number

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (is-natural-number) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

is-natural-number.js

Check if a value is a natural number

Installation

Package managers

npm

npm install is-natural-number

Bower

bower install is-natural-number

Duo

var isNaturalNumber = require('shinnn/is-natural-number.js');

Standalone

Download the script file directly.

API

isNaturalNumber(number, option)

number: Number
option: Object
Return: Boolean

It returns true if the first argument is one of the natural numbers. If not, or the argument is not a number, it returns false.

isNaturalNumber(10); //=> true

isNaturalNumber(-10); //=> false
isNaturalNumber(10.5); //=> false
isNaturalNumber(Infinity); //=> false
isNaturalNumber('10'); //=> false

Check the test for more detailed specifications.

option.includeZero

Type: Boolean Default: false

By default the number 0 is not regarded as a natural number.

Setting this option true makes 0 regarded as a natural number.

isNaturalNumber(0); //=> false
isNaturalNumber(0, {includeZero: true}); //=> true

License

Licensed under the MIT License.