Introduction to Programming using Java: 4. NetBeans | Varibles (Data Type) | Constants
PROBLEM: Finding the AREA of a CIRCLE given the radius
area = pi * radius * radius
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Data Type: a data type is a classification identifying types of data, such as floating-point, integer, or Boolean, that determines the possible values for that type and the operations that can be done on values of that type;
Constant: a variable whose value that never changes during run time