math-sign-x

math-sign-x

ES6-compliant shim for Math.sign.

See: 20.2.2.29 Math.sign(x)
Version: 2.1.0
Author: Xotic750 [e-mail]
License: MIT
Copyright: Xotic750

module.exports(x) ⇒ number ⏏

This method returns the sign of a number, indicating whether the number is positive, negative or zero.

Kind: Exported function
Returns: number - A number representing the sign of the given argument. If the argument is a positive number, negative number, positive zero or negative zero, the function will return 1, -1, 0 or -0 respectively. Otherwise, NaN is returned.

Param	Type	Description
x	*	A number.

Example

var mathSign = require('math-sign-x');

mathSign(3);     //  1
mathSign(-3);    // -1
mathSign('-3');  // -1
mathSign(0);     //  0
mathSign(-0);    // -0
mathSign(NaN);   // NaN
mathSign('foo'); // NaN
mathSign();      // NaN