Analyze the characteristics of Go language data types

Go language data type feature analysis

1. Overview

Go language is a statically typed programming language that supports rich data types , including basic types, composite types and reference types. This article will analyze the characteristics of commonly used data types in the Go language and provide corresponding code examples.

2. Basic types

1. Integer type

Go language provides a variety of integer data types, including int, int8, int16, int32, int64, uint, uint8, uint16, uint32 and uint64. Their characteristics are as follows:

• Integer variables are stored in two's complement format in memory, ensuring the accuracy of the values.
• Integer constants in the Go language do not have a fixed size, and their type will be automatically inferred based on the size of the value.

Sample code:

var a int = 10
var b int64 = 100
const c = 20
const d int64 = 200

2. Floating point type

Go language provides two floating point data types: float32 and float64. Their characteristics are as follows:

• The representation of floating point numbers in memory is the IEEE 754 standard.
• Floating point constants default to float64 type.

Sample code:

var a float32 = 3.14
var b float64 = 3.1415926
const c = 1.2

3. Boolean type

The Boolean data type of Go language is bool, and its characteristics are as follows:

• The bool type has only two values: true and false.
• Boolean type variables are usually used for conditional judgment.

Sample code:

var a bool = true
var b bool = false

4. Character type

The Go language uses byte to represent a single byte and rune to represent Unicode characters. Their characteristics are as follows: The

• byte type is essentially a uint8 type, which can represent ASCII code characters.
• The rune type is essentially an int32 type and can represent any Unicode character.

Sample code:

var a byte = 'A'
var b rune = '中'

3. Composite type

1. Array

The array in Go language is a Value type, its characteristics are as follows:

• The length of the array is fixed and cannot be dynamically expanded.
• The elements in the array must be of the same type.

Sample code:

var a [5]int = [5]int{1, 2, 3, 4, 5}
var b = [3]string{"Hello", "World", "Go"}

2. Slice

The slice in Go language is a reference type, and its characteristics are as follows:

• A slice is a reference to a contiguous segment of an array.
• Slices have the ability to dynamically expand and can be automatically expanded according to demand.

Sample code:

var a []int = []int{1, 2, 3, 4, 5}
b := make([]int, 3, 5)

3. String

The string in Go language is immutable, and its characteristics are as follows:

• A string is composed of a series of characters, and the characters can be accessed through subscripts.
• String type values ​​can be spliced ​​with the plus sign.

Sample code:

var a string = "Hello"
b := "World"
c := a + ", " + b

4. Reference type

1. Pointer

The Go language allows access to memory through pointers The data in it has the following characteristics:

• The pointer variable stores a memory address.
• Variables can be accessed indirectly through pointers.

Sample code:

var a int = 10
b := &a

2. Structure

The structure in Go language is a composite type, and its characteristics are as follows:

• The structure can contain multiple fields, and each field can have different data types.
• The fields of the structure can be accessed through the dot operator.

Sample code:

type Person struct {
    Name string
    Age  int
}

var p1 Person = Person{"Tom", 20}
var p2 Person = Person{Name: "Jerry", Age: 18}

To sum up, Go language provides rich data types, including basic types, composite types and reference types. By understanding and analyzing the characteristics of different data types, we can better understand and use these data types, thereby improving programming efficiency and code quality.

The above is an introduction to the characteristics analysis of Go language data types and corresponding code examples. I hope it will be helpful to readers.

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