Adobe 38043740 Developing Applications - Page 119

DEVELOPING COLDFUSION 9 APPLICATIONS 114 The CFML Programming Language • All statements end with a semicolon, and line breaks in the code are ignored. • Assignments are statements, not expressions, and therefore cannot be used in situations that require evaluating the assignment operation. • JavaScript objects, such as Window and Document, are not available. • Only the ColdFusion server processes CFScript. There is no client-side CFScript. CFScript limitation You cannot include ColdFusion tags in CFScript. However, you can include cfscript blocks inside other ColdFusion tags, such as cfoutput. Using CFScript statements CFScript includes the following types of statements: • Assignment statements and functions • Conditional processing statements • Looping statements Using assignment statements and functions CFScript assignment statements are the equivalent of the cfset tag. These statements have the following form: lval = expression; eval is any ColdFusion variable reference; for example: x = "positive"; y = x; a[3]=5; structure.member=10; ArrayCopy=myArray; You can use ColdFusion function calls, including UDFs, directly in CFScript. For example, the following line is a valid CFScript statement: StructInsert(employee,"lastname",FORM.lastname); Using conditional processing statements CFScript includes the following conditional processing statements: • if and else statements, which serve the same purpose as the cfif, cfelseif, and cfelse tags • switch, case, and default statements, which are the equivalents of the cfswitch, cfcase, and cfdefaultcase tags Using if and else statements The if and else statements have the following syntax: if(expr) statement [else statement] In its simplest form, an if statement looks as follows: if(value EQ 2700) message = "You've reached the maximum"; A simple if-else statement looks like the following: Last updated 1/20/2012