NaN Constant

NaN Constant (JavaScript)

 

A special constant that specifies thatNot an expression is not a number.

The NaN constant (not a number) is a member of the Global object, and is made available when the scripting engine is initialized.

Requirements

The NaN property was introduced in Internet Explorer before Internet Explorer 6, and was made read-only in Internet Explorer 9 standards mode.

Applies To: Global Object (JavaScript)

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