Javascript constructor It returns a reference to the Number function that created the instance's prototype. Syntax Its syntax is as follows: number.constructor() Return value Returns the function that created this object's instance. Example Try the following example. JavaScript constructor() Method var num = new Number( 177.1234 ); document.write("num.constructor() is : " + num.constructor); Output num.constructor() is : function Number() { [native code] } Number Methods The Number object contains only the default methods that are a part of every object's definition. Method Description toExponential() Forces a number to display in exponential notation, even if 120
Javascript the number is in the range in which JavaScript normally uses standard notation. toFixed() Formats a number with a specific number of digits to the right of the decimal. toLocaleString() Returns a string value version of the current number in a format that may vary according to a browser's local settings. toPrecision() toString() valueOf() Defines how many total digits (including digits to the left and right of the decimal) to display of a number. Returns the string representation of the number's value. Returns the number's value. In the following sections, we will have a few examples to explain the methods of Number. toExponential () This method returns a string representing the number object in exponential notation. Syntax Its syntax is as follows: number.toExponential( [fractionDigits] ) Parameter Details fractionDigits: An integer specifying the number of digits after the decimal point. Defaults to as many digits as necessary to specify the number. Return Value A string representing a Number object in exponential notation with one digit before the decimal point, rounded to fractionDigits digits after the decimal point. If the fractionDigits argument is omitted, the number of digits after the decimal point defaults to the number of digits necessary to represent the value uniquely. Example 121
About the Tutorial JavaScript is a
Bitwise Operators .................
23. String ........................
setUTCDate () .....................
Checking for Plug-Ins .............
1. OVERVIEW Javascript What is Java
Javascript components, integrates w
Javascript This function can be use
Javascript The following example sh
Javascript JavaScript in Chrome Her
4. PLACEMENT Javascript There is a
Javascript This code will
5. VARIABLES Javascript JavaScript
Javascript Within the body of a fun
6. OPERATORS Javascript What is an
Javascript the right operand, if ye
Javascript Output (a == b) => false
Javascript Output (a && b) => fal
Javascript document.write("(a | b)
Javascript Ex: C /= A is equivalent
Javascript Set the variables to dif
Javascript Function Undefined Null
7. IF-ELSE Javascript While writing
Javascript Output Qualifies for dri
Javascript Try the following code t
Javascript Syntax The objective of
Javascript switch (grade) { case 'A
Javascript Syntax The syntax of whi
Javascript do{ Statement(s) to be e
10. FOR LOOP Javascript The for Loo
Javascript Current Count : 6 Curren
Javascript Set the variable to diff
Javascript Set the variable to
Javascript Entering the loop 2 3 4
Javascript Output Entering th
13. FUNCTIONS Javascript A function
Javascript Click the following butt
Javascript Click the following but
Javascript JavaScript String font
Javascript JavaScript String link(
Javascript JavaScript String strik
Javascript JavaScript String sup(
Javascript input length prototype T
Javascript Prototype The prototype
Javascript push() reduce() reduceRi
Javascript every () Javascript arra
Javascript } var passed = [12, 5, 8
Javascript Array.prototype.filter =
Javascript } }; Example Try the fol
Javascript var len = this.length; v
Javascript join () Javascript array
Javascript var from = Number(argume
Javascript } var index = [12, 5, 8,
Javascript Array.prototype.map = fu
Javascript Its syntax is as follows
Javascript var rv = arguments[1]; }
Javascript } } throw new TypeError(
Javascript } rv = this[i--]; break;
Javascript } rv = fun.call(null, rv
Javascript Output Removed element
Javascript { } if (i in this && fun
Javascript Return Value Returns a s
Javascript toString () Javascript a
25. DATE Javascript The Date object
Javascript Return Value Returns the
Javascript Date Methods Here is a l
Javascript universal time. setUTCMo
Javascript Syntax Its syntax is as
Javascript Example Try the followin
Javascript var dt = new Date(); d
Javascript getMonth() : 11 getSecon
Javascript Syntax Its syntax is as
Javascript Try the following exampl
Javascript Output getUTCHours() :
Javascript Syntax Its syntax is as
Javascript JavaScript getYear Met
Javascript JavaScript setFullYear
Javascript If you specify a number
Javascript monthValue : An integ
Javascript setTime () Javascript da
Javascript Date.setUTCFullYear(year
Javascript document.write( dt );
Javascript Try the following exampl
Javascript Example Try the followin
Javascript var dt = new Date(1993,
Javascript toLocaleDateString () Ja
Javascript Syntax Its syntax is as
Javascript For instances of Date,
Javascript var dateobject = new
Javascript Output 743850547000 Date
Javascript minutes : An integer
Javascript In the following section
Javascript Example Try the followin
Javascript Property Value is : 0.43
Javascript JavaScript Math SQRT2 P
Javascript Try the following exampl
Javascript First Test Value : 3.141
Javascript JavaScript Math atan() M
Javascript var value = Math.atan2(+
Javascript Example Try the followin
Javascript Output First Test Value
Javascript var value = Math.log(10
Javascript min ( ) This method retu
Javascript var value = Math.pow(7,
Javascript Return Value Returns the
Javascript Output First Test Val
Javascript Example Try the followin
27. REGEXP Javascript A regular exp
Javascript Examples Following examp
Javascript m g Specifies that if th
Javascript Try the following exampl
Javascript Test1 - ignoreCase prope
Javascript if ( re.multiline ){ doc
Javascript exec ( ) The exec method
Javascript document.write("Test 2 -
Javascript document.write("Test 1 -
Javascript There are several DOMs i
Javascript forms[ ] 9 An array of F
Javascript Ex: document.close( ) op
Javascript This is main title Click
Javascript createElement( tagName)
Javascript NOTE: This example r
Javascript Specifies the loading st
Javascript NOTE: This example
Javascript Part 3: JavaScript Advan
Javascript Logical Errors Logic err
Javascript Now let us try to catch
Javascript Output Click the followi
Javascript Click the following to s
30. FORM VALIDATION Javascript Form
Javascript Basic Form Validation Fi
Javascript var emailID = document.m
Javascript Manual Animation So let'
Javascript } function moveRight(){
Javascript It is not possible to s
Javascript Output Checking for Plug
Javascript //--> If you
Javascript Error Messages in Firefo
Javascript Use a JavaScript Debugge
34. IMAGE MAP Javascript You can us
Javascript Output You can feel the
Javascript 6 plugins[] This propert
Javascript document.write(" Browser
Change language