Java data types categorize values: primitives (int, double) store simple values, objects (String) hold complex data. Choose wisely for efficient and accurate programming.
Numeric Types:
byte:
Size: 8 bits
Range: -128 to 127
Common Usage: Used when memory conservation is crucial, or when working with raw binary data.
short:
Size: 16 bits
Range: -32,768 to 32,767
Common Usage: Similar to byte, used in situations where a larger range than byte is needed.
int:
Size: 32 bits
Range: -2^31 to 2^31-1 (approximately -2.1 billion to 2.1 billion)
Common Usage: Default choice for integer values in most cases.
long:
Size: 64 bits
Range: -2^63 to 2^63-1 (approximately -9.2 quintillion to 9.2 quintillion)
Common Usage: Used when a wider range of integer values is needed, or for representing timestamps.
float:
Size: 32 bits
Range: Approximately ±1.4 x 10^-45 to ±3.4 x 10^38
Common Usage: Used for decimal numbers when precision up to seven digits is acceptable.
double:
Size: 64 bits
Range: Approximately ±4.9 x 10^-324 to ±1.8 x 10^308
Common Usage: Default choice for decimal numbers, provides greater precision than float.
Character Type:
char:
Size: 16 bits
Range: Represents a single Unicode character.
Common Usage: Used to store characters and symbols.
Boolean Type:
Boolean:
Size: Not precisely defined, typically implemented as a single byte
Values: true or false
Common Usage: Used for Boolean logic, conditions, and flags.
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