What is the core writing language of Go language?

Title: What is the core writing language of Go language?

Go language is a programming language developed by Google and is called "C language in the cloud era". It has efficient concurrency design, concise syntax and powerful performance, so it has been widely used in fields such as cloud computing, big data and artificial intelligence. In the Go language, the core writing language is the Go language itself, which implements various functions by using the native features of the Go language.

The syntax of Go language is concise, easy to read and write. The core writing language mainly includes the following aspects:

1. Concurrent programming
   One of the biggest features of Go language It is native support for concurrent programming. It provides two concurrency primitives, goroutine and channel, making concurrent programming very simple and efficient. The following is a simple concurrency example:

package main

import (
    "fmt"
    "time"
)

func printNumbers() {
    for i := 0; i < 5; i++ {
        fmt.Println(i)
        time.Sleep(time.Second)
    }
}

func main() {
    go printNumbers()
    go printNumbers()

    time.Sleep(5 * time.Second)
}

In the above code, we use the go keyword to start the goroutine of the two printNumbers functions , they will execute and output numbers at the same time, demonstrating the simple and powerful concurrency features of Go language.

2. Functional programming
   The Go language is designed to support the functional programming paradigm, and functions are also first-class citizens. We can operate on functions just like other data, passing functions as arguments to other functions, or having functions return a function. The following is an example of a function as a parameter:

package main

import "fmt"

func apply(f func(int) int, x int) int {
    return f(x)
}

func multiplyByTwo(x int) int {
    return x * 2
}

func main() {
    result := apply(multiplyByTwo, 3)
    fmt.Println(result) // 输出6
}

In the above code, the apply function accepts a function as a parameter and calls the function to process the input. In this way, we can use functional thinking to solve problems and improve the readability and maintainability of the code.

3. Interface and polymorphism
   The interface and polymorphism mechanism in the Go language make the code more flexible and extensible. With an interface, we can define a set of methods, and then any type that implements these methods can implicitly implement the interface. The following is an example of interfaces and polymorphism:

package main

import "fmt"

type Shape interface {
    Area() float64
}

type Circle struct {
    Radius float64
}

func (c Circle) Area() float64 {
    return 3.14 * c.Radius * c.Radius
}

func printArea(s Shape) {
    fmt.Printf("面积为 %f
", s.Area())
}

func main() {
    c := Circle{Radius: 3}
    printArea(c) // 输出面积为 28.260000
}

In the above code, we define a Shape interface and an implementation of the Area method The Circle type implements the polymorphic method printArea through the interface, so that any type that implements the Area method can use this method.

In general, the core programming language of Go language includes features such as concurrent programming, functional programming, interfaces and polymorphism. These features make Go language a very powerful and flexible programming language. Through the display of sample codes, we can better understand the design concepts and functions of the Go language, which will help with subsequent learning and application.

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