JavaScript 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 Number.NaN Property

The Number.isNaN() Method

The isNan() Method

The Infinity Property

The isFinite() Method

Syntax

NaN

Return Value

NaN

Browser Support

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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