Adobe 38043740 Developing Applications - Page 121

DEVELOPING COLDFUSION 9 APPLICATIONS 116 The CFML Programming Language • The default statement does not have to follow all case statements, but it is good programming practice to do so. If any case statements follow the default statement, you must end the default block code with a break statement. • The default statement is not required. However, use one if the case constants do not include all possible values of the expression. The following switch statement takes the value of a name variable: 1 If the name is John or Robert, it sets both the male variable and the found variable to True. 2 If the name is Mary, it sets the male variable to False and the found variable to True. 3 Otherwise, it sets the found variable to False. switch(name) { case "John": case "Robert": male=True; found=True; break; case "Mary": male=False; found=True; break; default: found=False; } //end switch Using looping statements CFScript provides a richer selection of looping constructs than those supplied by CFML tags. It enables you to create efficient looping constructs like those in most programming and scripting languages. CFScript provides the following looping constructs: • For • While • Do-while • For-in CFScript also includes the continue and break statements that control loop processing. Using for loops The for loop has the following format: for (initial-expression; test-expression; final-expression) statement The initial-expression and final-expression can be one of the following: • A single assignment expression; for example, x=5 or loop=loop+1 • Any ColdFusion expression; for example, SetVariable("a",a+1) • Empty The test-expression can be one of the following: • Any ColdFusion expression; for example: A LT 5 index LE x status EQ "not found" AND index LT end Last updated 1/20/2012