Go language, also known as Golang, is an open source programming language developed by Google. Its design goals are to increase programmer productivity, reduce code complexity, and make programs more stable and reliable. Go language has the characteristics of concurrent programming and can easily perform concurrent processing. It is suitable for developing network servers, distributed systems and large-scale software projects.
Another name for the Go language is "Golang", which is more concise and clear, and easier to remember. In the following articles, we will introduce some features and usage of Go language through specific code examples.
First, let’s look at a simple Hello World program:
package main import "fmt" func main() { fmt.Println("Hello, World!") }
The above code demonstrates a most basic Go language program, which uses the Println function in the fmt package to output "Hello, World !". Run this code and you will see the output on the terminal.
Next, let’s demonstrate the concurrent programming features of Go language. The following code shows how to use goroutine to process tasks concurrently:
package main import ( "fmt" "time" ) func task1() { for i := 0; i < 5; i++ { fmt.Println("Task 1 - Executing") time.Sleep(1 * time.Second) } } func task2() { for i := 0; i < 5; i++ { fmt.Println("Task 2 - Executing") time.Sleep(1 * time.Second) } } func main() { go task1() go task2() time.Sleep(6 * time.Second) fmt.Println("All tasks completed") }
In this code, we define two functions task1 and task2, which output information about task execution respectively, and use the time package in Sleep function to simulate task execution time. Use the go keyword to create a goroutine to execute these two tasks concurrently, and finally wait for a certain period of time through the Sleep function to output information on the completion of all tasks.
In addition to concurrent programming, the Go language also supports object-oriented programming. The following code shows the definition of a simple structure and method:
package main import "fmt" type Person struct { Name string Age int } func (p Person) introduce() { fmt.Printf("Hello, my name is %s and I am %d years old. ", p.Name, p.Age) } func main() { p := Person{Name: "Alice", Age: 25} p.introduce() }
In this code, we define a Person structure, containing two fields: name and age, and define an introduce method to output personal information. Create a Person object in the main function and call the introduce method to output information.
Through the above code examples, I hope readers will have a preliminary understanding of the Go language and appreciate its simplicity and efficiency. By continuing to study and practice, you can gain a deeper understanding of various usages and techniques of the Go language, thereby developing efficient and stable programs. As an emerging programming language, Go language is gradually becoming a popular choice in the field of Internet development. I believe it will play a greater role in the future.
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