lab5 - INT213 Lab 5 Number and String Functions This Lab...

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INT213 – Lab 5 Number and String Functions This Lab will look at the Number and String functions available in VBScript. These functions provide a variety of useful tools for manipulating and formatting data both coming into and going out of a script. Without these functions, script would have limited usefulness. In addition, using these functions along with Conditional statements and Loops will allow you to produce powerful scripts. If you want to see the variety of Functions available in VBScript look at this link: http://www.w3schools.com/vbscript/vbscript_ref_functions.asp Number Functions (Day 5 in text) Many scripts must deal with the manipulation of numbers. Financial calculations are just one area scripts must process numeric input and output a formatted result. Therefore we will look briefly at “number functions” that are built in to VBScript. Your text will show you several others that will not be dealt with here. INT( ) and Cint( ) These functions deal with Integers (whole numbers; numbers without decimals) and perform a similar function but in a different way. INT( ) basically chops off any decimals and leaves a whole number. It does not round the value. Cint( ), on the other hand, does the same thing but rounds the number to the nearest whole number. Here is an example: Save as: INT213lab5a.asp <% Option explicit 'dimension the variables Dim num1 , num2 , total 'assign some values num1 = 23.556789 num2 = 5.5 'do some calculations Response.write "This calculation does not use any functions<br>" Response.write "multiply num1 * num2 = " & num1 * num2 & "<br><br>" 'now use the INT( ) function Response.write "Using the INT( ) function : INT(num1) * num2 = " & INT ( num1 ) * num2 & "<br><br>" Response.write "Using the INT( ) for the entire calculation: INT(num1 * num2) = " & INT ( num1 * num2 ) Response.write "<br><br>" Response.write "Now let’s use the Cint( ) functions" & "<br><br>" 'using Cint() with the same numbers as above Response.write "Using the CInt( ) function : Cint(num1) * num2 = " & Cint ( num1 ) * num2 & "<br><br>" Response.write "Now Cint () for the entire calculation: Cint (num1 * num2) = " & Cint ( num1 * num2 ) Response.write "<br><br>" Response.Write "Now you can see what impact choosing the correct Function can have on a script" %>
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**** This short demonstration illustrates the importance of understanding how and when to use number functions. Logical errors that would be very difficult to find and correct can result from improper use us these functions .**** The other uses of the CINT( ) and INT( ) functions is to convert String Numbers to their pure numerical type. Let’s look at a script using a textbox Save as: INT213lab5b.asp <% 'get the number from the textbox and add the number twice (ex: 4 + 4) Response.write Request ( "txtboxnum" ) + Request ( "txtboxnum" ) %> <html> <body> <form name = "form1" > <br><br> <input type = "text" name = "txtboxnum" /> <br> <input type = "submit" name = "Submit"
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This note was uploaded on 11/26/2010 for the course CNS 196 taught by Professor James during the Fall '10 term at Seneca.

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lab5 - INT213 Lab 5 Number and String Functions This Lab...

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