How to read program in golang

Golang is a powerful programming language favored by more and more developers. In this article, we will explore how to read Golang programs.

1. Understanding Golang

Before we explain in depth how to read Golang programs, let us take a quick look at Golang.

Golang is a programming language for writing efficient, reliable and scalable programs. It emphasizes simplicity and readability while providing modern language features such as garbage collection, concurrency, and type safety. Golang has a great standard library that includes tons of useful functions and tools, making Golang a complete programming solution.

2. Reading Golang programs

Now that we have understood the basics of Golang, let’s take a look at how to read Golang programs.

First, you need to install Golang. You can download and install the latest version of Golang from the Golang official website (https://golang.org/).

A Golang program usually consists of several files, the most important of which is the main file. The main file of a Golang program usually has a ".go" extension.

Let's take a look at a very simple Golang program that can output "Hello World!" to the console:

package main

import "fmt"

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

In this program, we use the keyword "package" to Declare a package named "main". In Golang, a program must contain a package named "main" because Golang needs to know where the program starts running.

The "import" keyword is used to import other packages that can be used in our program. In this example, we have imported a package called "fmt" which helps us print messages to the console.

The "func" keyword is used to declare a function. In this example, we declare a function called "main".

"fmt.Println" is a function we use, which outputs "Hello World!" to the console.

Now we compile and run this Golang program. Open a terminal window, enter the directory where the program is located, and run the following command:

go build

This will compile our program and generate an executable file. In Windows systems, the name of this executable file is "main.exe".

To run our program, just enter the following command in the terminal:

./main

This will start our program and print "Hello World!" to the console.

3. Conclusion

In this article, we learned about the basic functions of Golang and learned how to read Golang programs. We hope this article will be helpful to you in the process of learning Golang. If you want to learn Golang in depth, you can check the official Golang documentation and refer to other related resources.

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