After Golang is installed, how do you need to further use it?

Golang, also known as the Go language, is a programming language developed by Google. It was born mainly to solve some shortcomings of existing languages, such as the slow compilation speed of C language and the inflexible use of generics in Java language. Compared with other languages, Golang has the characteristics of strict type declaration, garbage collection, concurrent programming and efficient compiler, so it is widely used in some high-performance application fields.

So, after you successfully install the Golang compiler, you need to know how to use this programming language.

First, you need to set Golang’s environment variables. In a Windows system, you can do this by following these steps:

1. Open "Control Panel"
2. Select "System and Security", then select "System"
3. Click "Advanced System Settings"
4. In the "Advanced" tab, click "Environment Variables"
5. Find the "Path" variable in the system variables, double-click to open it
6. In Add the path to the Golang installation directory (for example: C:\Go\bin) at the end of the variable value
7. Click "OK" to save the changes

In the Linux system, you can pass Complete the following command:

export PATH=$PATH:/usr/local/go/bin

After completing the environment variable settings, you can start using the Golang compiler. First, you can write a simple "Hello World" program. Open your editor, create a new file, and enter the following code:

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")
}

In the above code, "package main" means that this file belongs to the "main" package, and the "import" statement imports the Golang standard The "fmt" package in the library is used to implement the output function. "func main()" is the entry function of the program, and "fmt.Println()" is used to output strings to the console.

After saving the file, enter the directory where the file is located in the command prompt or terminal, and enter the following command:

go run filename.go

Among them, "filename.go" represents the name of the program file you want to run. . After successful execution, you should see "Hello, World!" output on the console.

In the process of learning Golang programming, you also need to understand the concepts and usage methods of data types, functions, arrays, slices, mappings, structures, interfaces, concurrent programming, etc. supported by Golang. These knowledge points can be learned by reading Golang official documentation or referring to some excellent Golang programming books.

In short, Golang is a programming language worth learning. It not only has powerful functions and efficient performance, but also has unique advantages in concurrent programming. Mastering Golang programming skills will bring great help to your career development.

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