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Number Object Javascript

The Javascript Number object sports a set of constants and methods for script authors when they work with numeric data.

Number Object Syntax

Javascript CODE EXAMPLE
var num1 = 5;
var num2 = Number(5);
var num3 = new Number(5);

All three of the approaches above are acceptable syntax for establishing a number in Javascript.

 

Constants(Properties) of the Number Object

MAX_VALUE - represents the maximum value
MIN_VALUE - represents the minimum value
NaN - represents not a number value
NEGATIVE_INFINITY - represents negative infinite value
POSITIVE_INFINITY - represents positive infinite value

Javascript CODE EXAMPLE
var v1 = Number.MAX_VALUE;
var v2 = Number.MIN_VALUE;
var v3 = Number.NaN;
var v4 = Number.NEGATIVE_INFINITY;
var v5 = Number.POSITIVE_INFINITY;

Properties of the number object are constants, which means they are values that do not change.

 

Methods of the Number Object

toExponential - returns exponential notation of a number
toFixed - returns fixed point notation of a number
toPrecision - returns fixed point notation to a specified precision
toString - return a string that represents the number(convert number to string object)
valueOf - return the primitive value of a number

Javascript CODE EXAMPLE
var num = 50;

var exn = num.toExponential(2);
var fix = num.toFixed(3);
var pre = num.toPrecision(5);
var str = num.toString();
var val = num.valueOf();

 

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