These are named memory location for storing data Variables have data types that describe the value they can hold

1. Primitive types: These types hold data bits in memory and examples are
   1. byte: Holds whole numbers byte byteMin = -128; byte byteMax = 127;
   2. short: Holds whole numbers short shortMin = -32768;
   3. int: Holds whole numbers int max = 2147483647; int min = -2147483648;
   4. long: Holds whole numbers long longMin = -9223372036854775808L; long longMax = 9223372036854775807L;
   5. float: Holds fractions
   6. double:
2. Reference types:
   1. String