Data Types A data type defines the kind of data a variable can store, the operations that can be performed on it, and the amount of memory allocated. Java Primitive Data Types Data Type Size Range (Approx.) Example Byte 1 byte -128 to 127 byte a = 100; short 2 bytes -32,768 to 32,767 short s = 1000; Int 4 bytes -2,147,483,648 to 2,147,483,647 int num = 50000; Long 8 bytes -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 long l = 100000L; float 4 bytes ~6–7 decimal digits float f = 5.75f; double 8 bytes ~15 decimal digits double d = 19.99; Char 2 bytes Single Unicode character char c = 'A'; boolean 1 bit* tru...