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3.1 Variables

Variables in E can hold many different kinds of data (called types). However, before a variable can be used it must be defined, and this is known as declaring the variable. A variable declaration also decides whether the variable is available for the whole program or just during the code of a procedure (i.e., whether the variable is global or local). Finally, the data stored in a variable can be changed using assignments. The following sections discuss these topics in slightly more detail.


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