WML supports variables that can hold transitional data between cards, provide custom output tailored to individual users, and more.

Variables are special holding places for the values. They can hold numeric or alpha numeric values and their values can be changed by code at the requirement which needed. However, it is usually good practice to dedicate variables to particular purposes, and hence, to particular types of data.

Variables in WML consist of words, enclosed in parentheses, prefixed with a dollar sign ($). For example:

The dollar sign ($) is used to signify a variable in WML, it is a reserved character in WML. If you want an actual dollar sign to appear anywhere in your card(s),you use a double dollar sign instead ("$$").

Variable names must start with a letter or underscore. Subsequent characters can be alpha, numeric, or underscores. Variables are case sensitive; "phone_number" is different from "Phone_Number."

WML will substitute the value of the variable where the variable name appears.

Variables can also be set through an input element (like input, select, option, etc.).

The following example given bellow that will create a variable named collegename:

To use the variable we created in the example above: