JavaScript Number NaN

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Examples

let x = Number.NaN;
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let x = NaN;
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Description

In JavaScript, NaN is short for "Not-a-Number".

In JavaScript, NaN is a number that is not a legal number.

The Global NaN property is the same as the Number.Nan property.

See Also:

The Global isNaN() Method

The Number.isNaN() Method

Syntax

Number.NaN

Browser Support

Number.NaN is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:

Chrome Edge Firefox Safari Opera IE
Yes Yes Yes Yes Yes Yes
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