What are Java's primitive data types?

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Java has eight primitive data types that serve as the most basic building blocks for data manipulation. These types are not objects and are stored directly in memory, which makes them highly efficient.

1. byte:

   • Size: 8 bits

   • Range: -128 to 127

   • Useful for saving memory in large arrays.

2. short:

   • Size: 16 bits

   • Range: -32,768 to 32,767

   • More memory-efficient than int for small numbers.

3. int:

   • Size: 32 bits

   • Range: -2³¹ to 2³¹-1

   • Default for integer values.

4. long:

   • Size: 64 bits

   • Range: -2⁶³ to 2⁶³-1

   • Used when a wider range than int is needed.

5. float:

   • Size: 32 bits

   • Single-precision, for saving memory with decimal values.

   • Not precise for large or financial values.

6. double:

   • Size: 64 bits

   • Double-precision, and the default for decimal values.

   • More accurate than float.

7. char:

   • Size: 16 bits

   • Stores a single Unicode character.

   • Range: '\u0000' (0) to '\uffff' (65,535).

8. Boolean:

   • Only two values: true or false.

   • Used for logical decisions.

These types are defined by the Java language for performance and efficiency. Java automatically uses these in variables, method arguments, and expressions, offering the foundation for all complex types in the language.

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