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    Number.prototype.valueOf()

    Summary

    The valueOf() method returns the wrapped primitive value of a Number object.

    Syntax

    numObj.valueOf()

    Parameters

    None.

    Description

    This method is usually called internally by JavaScript and not explicitly in code.

    Examples

    Example: Using valueOf

    var numObj = new Number(10);
    console.log(typeof numObj); // object
    
    var num = numObj.valueOf();
    console.log(num);           // 10
    console.log(typeof num);    // number
    

    Specifications

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

    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

    Document Tags and Contributors

    Contributors to this page: evilpie, Sheppy, fscholz, Mingun, ziyunfei, ethertank, Waldo, Mgjbot, Potappo
    Last updated by: ziyunfei,
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