NaN  Number  class property JS Home  <<  JS Reference  <<  Number  <<  NaN

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Description

Represents the value Not-A-Number.

• Like all class properties NaN should be used on the class rather than an instance of the class.

Syntax

Parameters

None.

Examples

Below are some examples showing comparisons of using Number.NaN and an unobtainable result.

  var nanValues = new Array(4);

nanValues[0] = Number.NaN == Number.NaN; // NaN not equal
nanValues[1] = Number.NaN === Number.NaN; // NaN not strict
nanValues[2] = Number.NaN(isNaN); // check against isNaN
nanValues[3] = Number.POSITIVE_INFINITY * 0; // unobtainable 

alert(nanValues);

Related Tutorials

JavaScript Advanced Tutorials - Lesson 3 - Number

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• NEGATIVE_INFINITY     >>