The document describes various date, time, and number functions in VBScript. It provides examples of functions like DateAdd(), DateDiff(), DatePart(), DateSerial(), FormatDateTime(), IsDate(), Day(), Month(), Year(), MonthName(), WeekDay(), Now(), Hour(), Minute(), Second(), Time(), Timer(), and TimeSerial(). These functions allow manipulating dates and times, extracting date/time parts, formatting dates, comparing dates, and converting between number formats in VBScript programs. Syntax and examples are given for each function to demonstrate their usage.

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- By Varsha Kumari
Assistant Professor
CEA Department, GLA University Mathura

3. Mathematical Functions
Date Functions
Time Functions

4.  Used to evaluate the mathematical and trigonometrical
functions of a given input number.
 Syntax:
variable = Mathematical_function (Expression)

5.  Int
 A Function, which returns the integer part of the given number
 Ex dim a: a=20.50
a=Int(a) Output : 20
 Log
 A Function, which returns the natural logarithm of the given number.
 Hex
 A Function, which returns the Hexadecimal value of the given number.
 a=Hex(a) Output : 14

6.  Rnd
 A Function, which returns a random number between 0 and 1.
 a=Rnd()
 Sqr
 A Function, which returns the square root of the given number.
 Exp
 A Function, which returns the value of e raised to the specified number

7.  Sin
 A Function, which returns sine value of the given number
 Cos
 A Function, which returns cosine value of the given number
 Tan
 A Function, which returns tan value of the given number

8. <script type="text/vbscript">
document.write("Int value is : " & Int(24.50) & "<br>")
document.write("Hex value is : " & Hex(20.50) & "<br>")
document.write("Square Root value is : " & Sqr(400) & "<br>")
document.write("Round value is : " & Rnd() & "<br>")
document.write("Sin value is : " & Sin(120) & "<br>")
document.write("Cos value is : " & Cos(130) & "<br>")
</script>

9. <script type="text/vbscript">
document.write("Int value is : " & Int(24.50) & "<br>")
document.write("Hex value is : " & Hex(20.50) & "<br>")
document.write("Square Root value is : " & Sqr(400) & "<br>")
document.write("Round value is : " & Rnd() & "<br>")
document.write("Sin value is : " & Sin(120) & "<br>")
document.write("Cos value is : " & Cos(130) & "<br>")
</script>

10.  The Function returns the current system Date.
 Syntax date()
 Ex a = date()
document.write("The Value of a : " & a)
Output:
The Value of a : 22-10-2020
(d/m/y)

11.  The Function converts a valid date and time expression to type
date.
 Syntax cdate(date)
ex: b= cdate("22 Oct 2020")
document.write("The Value of b : " & b & "<br>")
b = cdate("Oct 22 2050")
document.write("The Value of b : " & b & "<br>")
Output:
The Value of a : 22-10-2020
The Value of b : 22-10-2020

12.  A Function, which returns a date to which a specified time
interval has been added.
 Syntax DateAdd(interval,number,date)
 Interval: d, m, yyyy, ww, q , h , n , s
 Number : +ve,-ve

13. <script type="text/vbscript">
a = date()
document.write("The Value after DateAdd month : " & DateAdd("m",2,a) & "<br>")
document.write("The Value after DateAdd day : " & DateAdd("d",2,a) & "<br>")
document.write("The Value after DateAdd year : " & DateAdd("yyyy",2,a) & "<br>")
document.write("The Value after DateAdd year previous : " & DateAdd("yyyy",-2,a) &
"<br>")
document.write("The Value after DateAdd week : " & DateAdd("ww",1,a) & "<br>")
</script>

14. <script type="text/vbscript">
a = date()
document.write("The Value after DateAdd month : " & DateAdd("m",2,a) & "<br>")
document.write("The Value after DateAdd day : " & DateAdd("d",2,a) & "<br>")
document.write("The Value after DateAdd year : " & DateAdd("yyyy",2,a) & "<br>")
document.write("The Value after DateAdd year previous : " & DateAdd("yyyy",-2,a) &
"<br>")
document.write("The Value after DateAdd week : " & DateAdd("ww",1,a) & "<br>")
</script>

15.  It is a function that returns the difference between two specified
time intervals.
 Syntax DateDiff(interval, date1, date2)

16. a= "22 Oct 2020 "
b="22 Oct 2050"
document.write("The Value after DateDifference year : " & DateDiff("yyyy",a,b) &
"<br>")
document.write("The Value after DateDifference month : " & DateDiff("m",a,b) &
"<br>")
document.write("The Value after DateDifference days : " & DateDiff("d",a,b) &
"<br>")
document.write("The Value after DateDifference hour : " & DateDiff("h",a,b) &
"<br>")
document.write("The Value after DateDifference minutes : " & DateDiff("n",a,b) &
"<br>")
document.write("The Value after DateDifference seconds : " & DateDiff("s",a,b) &
"<br>")

17. document.write("The Value after DateDifference year : " & DateDiff("yyyy",a,b) &
"<br>")
document.write("The Value after DateDifference month : " & DateDiff("m",a,b) &
"<br>")
document.write("The Value after DateDifference days : " & DateDiff("d",a,b) &
"<br>")
document.write("The Value after DateDifference hour : " & DateDiff("h",a,b) &
"<br>")
document.write("The Value after DateDifference minutes : " & DateDiff("n",a,b) &
"<br>")
document.write("The Value after DateDifference seconds : " & DateDiff("s",a,b) &
"<br>")

18.  It is a function that returns the specific part of a given date.
 Syntax DatePart(interval,date)
 Ex a= "22 Oct 2020 "
document.write("The Value after Datepart days : " & DatePart("d",a) & "<br>")
document.write("The Value after DatePart year : " & DatePart("yyyy",a) & "<br>")
document.write("The Value after DatePart year : " & DatePart(“ww",a) & "<br>")
Output:
The Value after Datepart days : 22
The Value after DateDifference year : 2020
The Value after DatePart week : 43

19.  It is a function that returns a date for the specified day, month
and year parameters.
 Syntax DateSerial(year,month,day)
 Ex document.write(DateSerial(2016,10,25))
 Output : 10-25-2016

20.  It is a function that helps the developers to format and return a valid date and time expression.
 Syntax FormatDateTime(date,format)
d = ("22-10-2020 20:25")
document.write("Line 1 : " & FormatDateTime(d,0) & "<br>")
document.write("Line 2 : " & FormatDateTime(d,1)& "<br>")
document.write("Line 3 : " & FormatDateTime(d,2)& "<br>" )
document.write("Line 4 : " & FormatDateTime(d,3) & "<br>")
document.write("Line 5 : " & FormatDateTime(d,4)& "<br>")
Output: Line 1 : 22-10-2020 20:25:00
Line 2 : 22 October 2020
Line 3 : 22-10-2020
Line 4 : 20:25:00
Line 5 : 20:25

21.  It is a function that returns a Boolean Value whether or Not the
given input is a date.
 Syntax IsDate(expression)
 Ex returns True
document.write("Line 1 : " & IsDate("Nov 03, 1950") & "<br>")
document.write("Line 2 : " & IsDate(#01/31/20#)& "<br>" )
document.write("Line 3 : " & IsDate(#05/31/20 10:30 PM#)& "<br>")

22.  The Day function returns a number between 1 and 31 that
represents the day of the specified date.
 Syntax Day(date)
 The Month function returns a number between 1 and 12 that
represents the month of the specified date.
 Syntax Month(date)
 The Year function returns an integer that represents a year of the
specified date.
 Syntax Year(date)

23. document.write(Day("22-10-2020 20:25")& "<br>")
document.write(Month("22-10-2020 20:25")& "<br>")
document.write(Year("22-10-2020 20:25")& "<br>")
document.write(WeekDay("22-10-2020 20:25")& "<br>")
Output:
22
10
2020
5

24.  The MonthName function returns the name of the month for the
specified date.
 Syntax MonthName(month[,toabbreviate])
MonthName(01,True) Jan
MonthName(01,false) January
 The WeekDay function returns an integer from 1 to 7 that
represents the day of the week for the specified date.
 Syntax Weekday(date)
 The WeekDayName function returns the name of the Weekday for
the specified day.
 Syntax WeekdayName(weekday)

25.  The Function Now returns the current system date and time.
 Syntax Now()
 The Hour Function returns a number between 0 and 23 that represents the
hour of the day for the specified time stamp.
 Syntax Hour(time)
 The Minute Function returns a number between 0 and 59 that represents
the Minute of the hour for the specified time stamp.
 Syntax Minute(time)
 The Second Function returns a number between 0 and 59 that represents
the Second of the hour for the specified time stamp.
 Syntax Second(time)
 The Time Function returns the current system time.
 Syntax Time()

26. document.write("The Value of sytem time and date : " & Now() & "<br>")
document.write("The Value of systemTime : " & Time() & "<br>")
document.write("Hour :" & Hour("22-10-2020 20:25:40")& "<br>")
document.write("Minute :" &Minute("22-10-2020 20:25:40")& "<br>")
document.write("Second :" &Second("22-10-2020 20:25:40")& "<br>")
Output:
The Value of sytem time and date : 22-10-2020 10:25:56
The Value of systemTime : 10:25:56
Hour :20
Minute :25
Second :40

27.  The Time Function returns the current system time.
 Syntax Time()
 Ex. b = Time()
 The Timer Function returns the number of seconds and
milliseconds since 12:00 AM.
 Syntax Timer()
 The TimeSerial function returns the time for the specified hour,
minute and second values.
 Syntax TimeSerial(hour,minute,second)

28.  Number functions help us to convert a given number from one
data subtype to another
data subtype.
 syntax
variable = function_name(expression)

31.  VB Script Tutorial point