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#yyds Dry Goods Inventory#[Yugong Series] August 2022 Go Teaching Course 008-Integer of Data Types

2022-08-11 00:58:00 【51CTO】

There are four data types in the go language: basic types, composite types, reference types, and interface types.

Type	Name	Length	zero value	Description
bool	Boolean	1	false	If its value is not true, it is false. You cannot use numbers to represent true or false
byte	bytes	1	0	uint8 alias
rune	Character Type	4	0	Dedicated to storing unicode encoding, equivalent to uint32
int, uint	Integer	4 or 8	0	Signed 32-bit or Unsigned 64-bit
int8	Integer	1	0	-128~ 127,
uint8	Integer	1	0	0~255
int16	Integer	2	0	-32768 ~ 32767,
uint16	Integer	2	0	0 ~ 65535
int32	Integer	4	0	-2147483648 to 2147483647
uint32	Integer	4	0	0 to 4294967295 (4.2 billion)
int64	Integer	8	0	-9223372036854775808 to 9223372036854775807
uint64	Integer	8	0	0 to 18446744073709551615 (1844 Beijing)
float32	float	4	0.0	Accurate to 7 decimal places
float64	float	8	0.0	Accurate to 15 decimal places
complex64	plural type	8
complex128	plural type	16		64-bit real and imaginary numbers
uintptr	Integer	4 or 8		a uint32 or uint64 integer large enough to store a pointer
strina	string		"”	utf-8 string

Integers are divided into the following two categories: signed integers and unsigned integers.

Signed integer (int): positive integer, negative integer, 0; divided by length: int8, int16, int32, int64
Unsigned integer (uint): positive integer, 0; divided by length: uint8, uint16, uint32, uint64

Range of integers:

Signed Integer
- 32-bit system: int is 4 bytes, range: -2147483648 to 2147483647
- 64-bit system: int is 8 bytes, range: -9223372036854775808 to 9223372036854775807
Unsigned int
- On 32-bit systems: 4 bytes, 0 to 4294967295
- On 64-bit systems: 8 bytes, 0 to 18446744073709551615

bytes

Bit (bit): The smallest storage unit, the computer stores binary 0, 1, and the bit is used to store binary.
Byte: The basic storage unit, represented by a capital B, 1 byte=8bit, 1KB=1024B, 1MB=1024KB, 1G=1024MB

#yyds Dry Goods Inventory#[Yugong Series] August 2022 Go Teaching Course 008-Data TypesInteger_64-bit system

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