1.3 Variables and Data Types
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|A symbol or container that holds a value.
|`int` is a Java type that represents an integer (a whole number)
|`char` is a Java type that represents a single character (a single letter)
|`double` is a Java type that represents a real number with decimal values
|Declare a variable
|Declaring a variable is defining it for the first time.
|Initialize a variable
|Initializing a variable is giving it an initial value, or a starting value.
|Primitive types are the basic, simple data types that are inherent to Java (int, double, char, and boolean)
|A boolean is a true or false value.
|Reference variables store the address of the value
|Prevents variables from changing value.