M2: Primitive Data Types & Number Systems

bit

A binary digit that can be a 0 or a 1.

byte

8 bits. A keyword meaning a data type with an integer value from -128 to 127.

short

"16 bits. A keyword meaning a data type with an integer value from -32,768 to 32,767"

int

32 bits. A keyword meaning a data type with an integer value from -2,147,483,648 to 2,147,483,647, about -2 billion to 2 billion.

long

64 bits. A keyword meaning a data type with an integer value from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.

float

32 bits. Keyword meaning a floating-point type with a mantissa and exponent used to save space.

double

64 bits. Keyword meaning a floating-point type with a mantissa and exponent typically used to store a floating-point value.

boolean

Keyword meaning a data type with 2 values, true and false.

char

16 bits. Keyword meaning a data type to store a single Unicode character with a numerical value between 0 and 65535.

binary number

A number in base 2, using the digits 0-1, and each digit's place is weighed by increasing powers of 2.

hexadecimal number

A number in base 16, using the digits 0-9 and A-F, and each digit's place is weighed by increasing powers of 16.

decimal number

A number in base 10 using the digits 0-9 and each digit's place is weighed by increasing powers of 10.