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Declaring and Using Variables

A variable is a location in the computer's memory where you can temporarily store information, such as a number or a string.

In a programming language, a string is a sequence of characters and is delimited by double quotes. An example of a string would be "Hello, World!"

Variables have three components to them:

• A value, such as 5, or “Hello, World!”

• A name, which is used to refer to the value of the variable.

• A type, which indicates what type of values can be stored. For example, a variable whose value is 5 would have the type Integer. A variable whose value is “Hello, World!” would have the type string.

Because a variable's ...