Explain primitive Data types of JAVA

Java defines 8 primitive types:

  • byte
    • Smallest integer type
    • It is a signed 8-bit type (1 Byte)
    • Range is -128 to 127
    • Especially useful when working with stream of data from a network or file
    • Example: byte b = 10;
  • short
    • short is signed 16-bit (2 Byte) type
    • o Range : -32768 to 32767
    • It is probably least used Java type
    • Example: short vId = 1234;
  • int
    • The most commonly used type
    • It is signed 32-bit (4 Byte) type
    • Range: -2,147,483,648 to  2,147,483,647
    • Example: int a = 1234;
  • long
    • long is signed 64-bit (8 Byte) type
    • It is useful when int type is not large enough to hold the desired value
    • Example: long soconds = 1234124231;
  • char
    • It is 16-bit (2 Byte) type
    • Range: 0 to 65,536
    • Example: char first = ‘A’; char second = 65;
  • float
    • It is 32-bit (4-Byte) type
    • It specifies a single-precision value
    • Example: float price = 1234.45213f
  • double
    • It uses 64-bit (8-Byte)
    • All math functions such as sin(),cos(),sqrt() etc… returns double value
    • Example: double pi = 3.14141414141414;
  • boolean
    • The boolean data type has only two possible values: true and false.
    • This data type represents one bit of information, but its "size" isn't something that's precisely defined.

Explain primitive Data types of JAVA

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