When a user switches from card to card in a deck, we need to store data in
variables. WML variables are case sensitive.
Specify a Variable with the Setvar Command
When someone executes a task (like go, prev, and refresh), the setvar element
can be used to set a variable with a specified value.
The following example will create a variable named i with a value of 500:
<setvar name="i" value="500"/>
The name and value attributes are required.
Specify a Variable through an Input Element
Variables can also be set through an input element (like input, select, option, etc.).
The following example will create a variable named schoolname:
<option value="HTML">HTML Tutorial</option>
<option value="XML">XML Tutorial</option>
To use the variable we created in the example above:
<p>You selected: $(schoolname)</p>
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