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    The Number.NaN property represents Not-A-Number. Equivalent of NaN.

    You do not have to create a Number object to access this static property (use Number.NaN).

    Property attributes of Number.NaN
    Writable no
    Enumerable no
    Configurable no


    Specification Status Comment
    ECMAScript 1st Edition. Standard Initial definition. Implemented in JavaScript 1.1.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Number.NaN' in that specification.
    ECMAScript 6 (ECMA-262)
    The definition of 'Number.NaN' in that specification.
    Release Candidate  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

    See also

    • The global NaN object.
    • The Number object it belongs to.

    Document Tags and Contributors

    Last updated by: Mingun,