User Guide

136 Chapter 6: Extending ColdFusion Pages with CFML Scripting
}
else if (indx IS ArrayLen(strings)) {
WriteOutput("Array ends at index " & indx & ".<br>");
break;
}
}
Handling exceptions
ColdFusion provides two statements for exception handling in CFScript: try and catch. These
statements are equivalent to the CFML
cftry and cfcatch tags.
Note: This section does not explain exception-handling concepts. For a discussion of exception
handling in ColdFusion, see Chapter 14, “Handling Errors,” on page 307.
Exception handling syntax and rules
Exception-handling code in CFScript has the following format:
try {
Code where exceptions will be caught
}
catch(exceptionType exceptionVariable) {
Code to handle exceptions of type exceptionType
that occur in the try block
}
...
catch(exceptionTypeN exceptionVariableN) {
Code to handle exceptions of type
exceptionTypeN that occur in the try block
}
Note: In CFScript,
catch statements follow the try block; you do not put them inside the try block.
This structure differs from that of the
cftry tag, which must include the cfcatch tags in its body.
When you have a try statement, you must have a catch statement. In the catch block, the
exceptionVariable variable contains the exception type. This variable is the equivalent of the
cfcatch tag cfcatch.Type built-in variable.