The Math object
It is used to perform
arithmetic operations.
Properties of Math object
|
Properties
|
Description
|
|
E
|
Holds Euler’s number whose approximate value is
2.718
|
|
LN2
|
Holds natural logarithm of 2, whose approximate
value is 0.693
|
|
LN10
|
Holds natural logarithm of 10, whose approximate
value is 2.302
|
|
LOG2E
|
Holds the base-2 logarithm of E, whose
approximate value is 1.442
|
|
LOG10E
|
Holds the base-10 logarithm of E, whose
approximate value is 0.434
|
|
PI
|
Holds the numeric value of PI, whose approximate
value is 0.707
|
|
SQRT1_2
|
Holds the square root of ½, whose approximate
value is 0.707
|
|
SQRT2
|
Holds the square root of 2, whose approximate
value is 1.414
|
Methods of the Math object
|
Method
|
Description
|
|
abs(x)
|
Returns the absolute value of x
|
|
acos(x)
|
Returns arccosine(in radian) of x
|
|
asin(x)
|
Returns arcsine(in radian) of x
|
|
atan(x)
|
Returns the arctangent of x with numeric value
between –PI/2 and PI/2 radians
|
|
atan2(y,x)
|
Returns the arctangent of the quotation on
dividing y and x
|
|
ceil(x)
|
Round up x to the nearest bigger integer
|
|
cos(x)
|
Returns cosine value of x
|
|
exp(x)
|
Returns the value of ex
|
|
floor(x)
|
Rounds up x to the nearest smaller integer
|
|
log(x)
|
Returns the natural logarithm value of x
|
|
max(x,y,z,…,n)
|
Returns the highest number from the given list
|
|
min(x,y,z,…,n)
|
Returns the lowest number from the given list
|
|
pow(x,y)
|
Returns x to the power of y
|
|
random()
|
Returns a random number between 0 and 1
|
|
round()
|
Rounds up x to the nearest integer
|
|
sin(x)
|
Returns sine value of x
|
|
sqrt(x)
|
Returns the square root of x
|
|
tan(x)
|
Returns the tangent value of x
|
Example
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Math Object</title>
</head>
<body>
<h1>JavaScript Math Object</h1>
<script>
document.write('Floor: ' + Math.floor(11.456) + '<br/>');
document.write('Ceil: ' + Math.ceil(11.456) + '<br/>');
document.write('Log: ' + Math.log(11.456) + '<br/>');
document.write('Max: ' + Math.max(11.456,12,56,1,-78) + '<br/>');
document.write('Min: ' + Math.min(11.456, -87, 78, 34) + '<br/>');
document.write('Power: ' + Math.pow(14,2) + '<br/>');
document.write('random: ' + Math.random() + '<br/>');
document.write('round: ' + Math.round(11.456) + '<br/>');
document.write('sin: ' + Math.sin(60) + '<br/>');
document.write('tan: ' + Math.tan(45) + '<br/>');
document.write('exp: ' + Math.exp(6) + '<br/>');
</script>
</body>
</html>
The Date object
It is used to display a
date on a web page or a timestamp in numerical or mathematical calculation.
The Date object can
represents dates 285616 years before or after January 1, 1970.
var date1=new Date(); or
var date1= new Date(milliseconds);
or var date1= new
Date(yyyy, mm , dd [, hr , min, sec, millisec]); or
var date1= new Date(“mm
dd, yyyy”); or var date1= new Date(“mm dd, yyyy hr:min:sec”);
Properties of the Date object
|
Properties
|
Description
|
|
constructor
|
Holds the value of constructor function that has
created the object
|
|
prototype
|
Adds properties and methods to the Date object
|
Methods of the Date Object
|
Methods
|
Description
|
|
getDate()
|
Returns the day of the month that ranges from 1
to 31
|
|
getDay()
|
Returns the numeric equivalence of the day of a
week that is 0 to 6. 0 for Monday and 6 for Sunday
|
|
getFullYear()
|
Returns the numerical equivalence of year in four
digit
|
|
getHours()
|
Return the hours which ranges from 0 to 23
|
|
getMilliseconds()
|
Returns the milliseconds that ranges from 0 to 999
|
|
getMinutes()
|
Returns minutes that ranges from 0 to 59
|
|
getMonth()
|
Returns numerical equivalence of month that
ranges from 0 to 11
|
|
getSeconds()
|
Returns the seconds that ranges from 0 to 59
|
|
getTime()
|
Returns number of milliseconds since midnight
jan1,1970
|
|
getTimezoneOffset()
|
Returns the difference of time (in minutes)
between the Greenwich mean time(GMT) and the local time
|
|
getUTCDate()
|
Returns the day of the month that ranges from 1
to 31 as per the universal time
|
|
getUTCDay()
|
Returns the numeric equivalence of the day of a
week that is 0 to 6. 0 for Monday and 6 for Sunday as per the universal time
|
|
getUTCFullYear()
|
Returns the numerical equivalence of year in four
digit as per the universal time
|
|
getUTCHours()
|
Return the hours which ranges from 0 to 23 as per
the universal time
|
|
getUTCMilliseconds()
|
Returns the milliseconds that ranges from 0 to 999
as per the universal time
|
|
getUTCMinutes()
|
Returns minutes that ranges from 0 to 59 as per
the universal time
|
|
getUTCMonth()
|
Returns numerical equivalence of month that
ranges from 0 to 11 as per the universal time
|
|
getUTCSeconds()
|
Returns the seconds that ranges from 0 to 59 as
per the universal time
|
|
parse()
|
Parses a date string and returns the number of
millisecond since the midnight of January 1,1970
|
|
setDate()
|
Sets the day of a month that ranges from 1 to 31
|
|
setFullYear()
|
Sets the year in four digits
|
|
setHours()
|
Sets the hours that ranges from 0 to 23
|
|
setMilliseconds()
|
Sets the milliseconds that ranges from 0 to 999
|
|
setMinutes()
|
Sets the minutes that ranges from 0 to 59
|
|
setMonth()
|
Sets the numerical equivalence of month that
ranges from 0 to 11
|
|
setSeconds()
|
Sets the seconds that ranges from 0 to 59
|
|
setTime()
|
Sets a date and time by adding or subtracting
specified milliseconds to/from midnight January 1,1970
|
|
setUTCDate()
|
Sets the day of a month that ranges from 1 to 31
as per the universal time
|
|
setUTCFullYear()
|
Sets the year in four digits as per the universal
time
|
|
setUTCHours()
|
Sets the hours that ranges from 0 to 23 as per
the universal time
|
|
setUTCMilliseconds()
|
Sets the milliseconds that ranges from0 to 999 as
per the universal time
|
|
setUTCMinutes()
|
Sets the minutes that ranges from 0 to 59 as per
the universal time
|
|
setUTCMonth()
|
Sets the numerical equivalence of month that
ranges from 0 to 11 as per the universal time
|
|
setUTCSeconds()
|
Sets the seconds that ranges from 0 to 59 as per
the universal time
|
|
toDateString()
|
Converts date into string
|
|
toLocalDateString()
|
Converts date into string as per local conventions
|
|
toLocalTimeString()
|
Converts time into string as per local conventions
|
|
toLocalString()
|
Converts the date object into a string as per
local convetions
|
|
toString()
|
Converts the date object into a string
|
|
toTimeStamp()
|
Converts time into a string
|
|
toUTCString()
|
Converts the date object into string as per the
universal time
|
|
UTC()
|
Holds the number milliseconds since the midnight
of January 1, 1970, as per the universal time
|
|
valueOf()
|
Returns the primitive value of the Date object.
|
Example
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Date Object</title>
</head>
<body>
<h1>JavaScript Date Object</h1>
<script>
var date = new Date();
document.write('Todays Date: ' + date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear() + '<br/>');
document.write('Time Is: ' + date.getHours() + '/' + (date.getMinutes() + 1) + '/' + date.getSeconds() + '<br/>');
</script>
</body>
</html>
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