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JavaScript Number Object


Number Object

The Number object is an object wrapper for primitive numeric values.

Number objects are created with new Number().

Syntax

var num = new Number(value);

Note: If the value parameter cannot be converted into a number, it returns NaN (Not-a-Number).


Number Object Properties

Property Description
constructor Returns the function that created the Number object's prototype
MAX_VALUE Returns the largest number possible in JavaScript
MIN_VALUE Returns the smallest number possible in JavaScript
NEGATIVE_INFINITY Represents negative infinity (returned on overflow)
NaN Represents a "Not-a-Number" value
POSITIVE_INFINITY Represents infinity (returned on overflow)
prototype Allows you to add properties and methods to an object

Number Object Methods

Method Description
toExponential(x) Converts a number into an exponential notation
toFixed(x) Formats a number with x numbers of digits after the decimal point
toPrecision(x) Formats a number to x length
toString() Converts a Number object to a string
valueOf() Returns the primitive value of a Number object


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