O'Reilly logo

Programming ColdFusion by Rob Brooks-Bilson

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CFScript Statements

CFScript contains a number of statements to handle flow control and looping, as we’ll discuss in this section. Note that you can’t use any CFML tags within a CFSCRIPT block.

if/else

The if/else statement has the same functionality as the CFIF and CFELSE (and by extension, CFELSEIF) tags in regular CFML. The if statement can be used alone, as in:

if (expression)
  statement;

Or it can be used with the else statement, as in:

if(expression)  
  statement;
else
  statement;

You can also use the else and if statements in combination to achieve the same results as the CFELSEIF tag:

if (expression)
  statement;
else if (expression)
  statement;
else
  statement;

To understand the differences between the CFIF/CFELSE tags and the if/else statement, let’s first consider an example that uses the CFIF and CFELSE tags. Example 18-3 assigns the current year to a variable called TheYear. The CFIF and CFELSE tags are then used to determine whether the current year is a leap year. The results are then written to the browser.

Example 18-3. Determining if the Current Year Is a Leap Year Using CFIF/CFELSE

<!--- set a variable equal to the current year --->
<CFSET TheYear=Year(Now(  ))>

<!--- Check to see if the current year is a leap year. --->
<CFIF IsLeapYear(TheYear)>
    <CFSET ReturnOutput="is a leap year.">
<CFELSE>
    <CFSET ReturnOutput="is not a leap year.">
</CFIF>

<CFOUTPUT>
#TheYear# #ReturnOutput#
</CFOUTPUT>

The same code can easily be rewritten using CFScript. Example 18-4 shows the ported ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required