Learn the techniques and methods of data type conversion using Go language

To master the skills and methods of data type conversion in Go language, you need specific code examples

1. Background introduction
In Go language, data type conversion is very important Common operations. Because different data types occupy different spaces in memory and are represented in different ways, when we need to convert between different types of data, we need to choose an appropriate conversion method based on specific scenarios. This article will share some techniques and methods of data type conversion in Go language, and give specific code examples.

2. Basic data type conversion

1. Conversion between int and int64
   In Go language, int and int64 are two different data types. They are stored in memory. The space occupied and the representation method are different. When you need to convert int to int64, you can use the int64() function for conversion. The specific code examples are as follows:

var num1 int = 10
var num2 int64 = int64(num1)

2. Conversion between float and int
   In the Go language, float and int are two different data types, and they are stored in memory. The space occupied and the way they are represented are different. When you need to convert float to int, you can use the int() function for conversion. The specific code examples are as follows:

var num1 float32 = 10.5
var num2 int = int(num1)

3. Conversion between string and int
   In the Go language, string and int are two different data types, and they are stored in memory. The space occupied and the way they are represented are different. When you need to convert string to int, you can use the Atoi() function in the strconv package for conversion. The specific code examples are as follows:

import "strconv"

var str string = "123"
var num int, err = strconv.Atoi(str)

4. Conversion between int and string
   In the Go language, int and string are two different data types, and they are stored in memory. The space occupied and the way they are represented are different. When you need to convert int to string, you can use the Itoa() function in the strconv package for conversion. Specific code examples are as follows:

import "strconv"

var num int = 123
var str string = strconv.Itoa(num)

3. Custom type conversion

1. Conversion between custom types based on existing types
   In Go language , we can define our own data type through the type keyword. When we need to convert between different custom types, we can use the type conversion operator () to convert. The specific code examples are as follows:

type MyInt int

var num1 MyInt = 10
var num2 int = int(num1)

2. Conversion between structures
   In the Go language, the structure is a composite data type. When we need to convert between different structures, we can use the type conversion operator () to convert. Specific code examples are as follows:

type Person struct {
    Name string
    Age  int
}

type Employee struct {
    Name   string
    Age    int
    Salary float64
}

var p1 Person = Person{Name: "Tom", Age: 20}
var e1 Employee = Employee(p1)

4. Interface type conversion
In Go language, interface is a special data type that can store any type of value. Type assertions can be used when we need to convert an interface type to another concrete type. The specific code examples are as follows:

var i interface{} = 10
num, ok := i.(int)
if ok {
    fmt.Println("Convert successfully:", num)
} else {
    fmt.Println("Conversion failed")
}

The above are the techniques and methods for mastering data type conversion in Go language, and specific code examples are given. In actual development, we need to choose the appropriate conversion method according to specific scenarios to ensure the correctness and efficiency of the program. Hope this article helps you!

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