What are the integer variables in java

There are four integer variable types in Java: byte (8 bits), short (16 bits), int (32 bits, default type), long (64 bits). Choosing the appropriate type depends on the size of the number that needs to be stored. To store a smaller range of numbers, use byte or short, and to store a larger range of numbers, use int or long.

Integer variables in Java

Integer variables are variable types used to store integer data in Java , divided into four types:

• byte

  • 8-bit signed integer, the value range is -128 to 127

• short

  • 16-bit signed integer, ranging from -32,768 to 32,767

• int

  • 32-bit signed integer, the value range is -2,147,483,648 to 2,147,483,647 (default)

• long

  ##64-bit signed integer, ranging from -2^63 to 2^63-1

Choose the appropriate integer type

Different integer types have different value ranges, and choosing the appropriate type depends on the size of the number that needs to be stored. For smaller ranges of numbers, you can use byte or short. For larger ranges of numbers, you can use int or long.

For example:

byte b = 127; // 8 位，取值范围：-128 至 127
short s = 32767; // 16 位，取值范围：-32768 至 32767
int i = 2147483647; // 32 位，取值范围：-2147483648 至 2147483647
long l = 9223372036854775807L; // 64 位，取值范围：-2^63 至 2^63-1

Note:

byte, short and int are signed integers and can represent negative values.
• long can represent an unsigned integer, but L or l needs to be added after the literal value, such as 9223372036854775807L.

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