WMLScript » Operators » Conditional
- Syntax:
- ? : ;
The conditional operator is used to assign one of two possible
values to an expression based upon the results from a boolean test
applied to a specified operand.
The
conditional operator is used in the following format:
expression = operand1 ? operand2 :
operand3;
This operator behaves as follows:
- A boolean (true or false) test is performed on operand1.
- If the test proves true, the expression is assigned the value of operand2.
- If the test proves false or invalid, the
expression is assigned the value of operand3.
Examples
Code:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.WAPforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1">
<p>
conditional example
</p>
<do type="accept">
<go href="ConditionalExample.wmls#findconditional()" />
</do>
</card>
<card id="card2">
<p>
expression = $(express)
</p>
</card>
</wml>Explanation:
Code for ConditionalExample.wml.
Language(s): WML
Code:
extern function findconditional()
{
var oper1;
var oper2 = "second operand";
var oper3 = "third operand";
var boo = Dialogs.prompt("true, false, or invalid", "");
if(boo == "true") oper1 = true;
if(boo == "false") oper1 = false;
if(boo == "invalid") oper1 = invalid;
var exp = oper1 ? oper2 : oper3;
WMLBrowser.setVar("express", exp);
WMLBrowser.go("ConditionalExample.wml#card2");
};Explanation:
Code for ConditionalExample.wmls.
Language(s): WML
See Also:
