Adobe COLDFUSION 9 Manual page 38

DEVELOPING COLDFUSION 9 APPLICATIONS
The CFML Programming Language
Category Description and types
Simple Represents one value. You can use simple data types directly in ColdFusion expressions. ColdFusion simple data
types are:
•
strings A sequence of alphanumeric characters enclosed in single or double quotation marks, such as "This is
a test."
•
integers A sequence of numbers written without quotation marks, such as 356.
•
real numbers, such as -3.14159
•
Boolean values Use True, Yes, or 1 for true and False, No, or 0 for false. Boolean values are not case sensitive.
•
date-time values ColdFusion supports a variety of data formats. For more information, see
formats" on page 44.
Complex A container for data. Complex variables generally represent more than one value. ColdFusion built-in complex
data types are:
•
arrays
•
structures
•
queries
Binary Raw data, such as the contents of a GIF file or an executable program file
Object COM, CORBA, Java, web services, and ColdFusion Component objects: Complex objects that you create and
access using the
Note: ColdFusion does not have a data type for unlimited precision decimal numbers, but it can represent such numbers
as strings and provides a function that supports unlimited precision decimal arithmetic. For more information, see
PrecisionEvaluate in the CFML Reference.
For more information on ColdFusion data types, see
Flow control
ColdFusion provides several tags that let you control how a page gets executed. These tags generally correspond to
programming language flow control statements, such as if, then, and else. The following tags provide ColdFusion flow
control:
Tags
cfif , cfelseif , cfelse
, ,
cfswitch cfcase cfdefaultcase
cfloop , cfbreak
,
cfabort cfexit
CFScript also provides a set of flow-control statements. For information on using flow-control statements in CFScript,
see "Extending ColdFusion Pages with CFML
the reference pages for these tags in the CFML Reference.
cfobject tag and other specialized tags.
"Using ColdFusion
Purpose
Select sections of code based on whether expressions are True or False.
Select among sections of code based on the value of an expression. Case processing is not limited
to True and False conditions.
Loop through code based on any of the following values: entries in a list, keys in a structure or
external object, entries in a query column, an index, or the value of a conditional expression.
End processing of a ColdFusion page or custom tag.
Scripting" on page 106. For more details on using flow-control tags, see
Last updated 8/5/2010
Variables" on page 38.
33
"Date and time