JavaScript Number Object

The JavaScript Number object acts as a wrapper for primitive numeric values.

Number object

The Number object can be used to handle numbers.

JavaScript has only one numeric data type and cannot distinguish between integers and floating-point values.

Numbers can have or not have decimals:

var a =　3.14;　　　　　//　Numbers with decimals
var b =　12;　　　　　　　//　Numbers without decimals

Scientific notation can be used to write very large or very small numbers:

var a =　1e5;　　　　　　//　100000
var b =　1e-1;　　　　　//　0.1
var c =　1.23e9;　　　//　1230000000

You can find ourIn the JavaScript Number tutorialLearn more about Numbers.

The following table lists the properties of the Number object:

Properties	Description
constructor	Returns a reference to the Number function used to create objects
MAX_VALUE	Returns the largest number in JavaScript
MIN_VALUE	Returns the smallest number in JavaScript
MAX_SAFE_INTEGER	Returns the largest safe integer in JavaScript (2 ^53-1)
MIN_SAFE_INTEGER	Returns the smallest safe integer in JavaScript (-2 ⁵³ - 1)
NaN	Represents the 'Not-a-Number' value
NEGATIVE_INFINITY	Represents negative infinity (returned when overflow occurs)
POSITIVE_INFINITY	Represents positive infinity (returned when overflow occurs)
prototype	Allows you to add properties and methods to the object

The following table lists the methods of the Number object:

Method	Description
isFinite()	Check if the passed value is a finite number
isInteger()	Check if the passed value is an integer
isNaN()	Check if the passed value isNaNand is of type Number
isSafeInteger()	Check if the value is a safe integer
toExponential()	Convert a number to exponential notation
toFixed()	Format a number using fixed-point notation
toPrecision()	Return a string representing the number with a specified precision
toString()	Convert a number to a string
valueOf()	Return the original value of the Number object

Note:All numeric methods return a new value, but they do not change the value of the original variable.