Is golang multi-threaded?

Golang is multi-threaded. Golang has a lightweight concurrency mechanism called "goroutine", and also provides a communication mechanism "channel" that can be used for communication between threads. It should be noted that concurrent programming in the Go language is based on a communication (channel) and coroutine (goroutine) model, rather than a model based on locks and shared memory. Therefore, when writing concurrent programs, you need to pay attention to avoid problems such as race conditions and deadlocks, etc.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Golang (Go language) supports multi-threaded programming. In Go language, goroutine can be used to implement concurrent programming. Goroutine is a lightweight thread in Go language and is scheduled by the Go runtime (Goroutine Scheduler).

In the Go language, you can use the keyword "go" to start a new goroutine. For example:

func main() {  
    go hello() // 启动一个新的goroutine，执行hello函数  
    go func() {  
        fmt.Println("world") // 启动一个新的goroutine，打印"world"  
    }()  
  
    // 等待一段时间，确保所有的goroutine都执行完成  
    time.Sleep(time.Second)  
}  
  
func hello() {  
    fmt.Println("hello") // 打印"hello"  
}

In the above example, we started two new goroutines to execute the hello function and the anonymous function respectively. These two goroutines will execute concurrently, and the output result may be "hello world" or "world hello".

It should be noted that concurrent programming in the Go language is based on a model of communication (channel) and coroutine (goroutine), not a model based on locks and shared memory. Therefore, you need to pay attention to avoid problems such as race conditions and deadlocks when writing concurrent programs. At the same time, the Go language also provides a wealth of concurrent programming libraries and tools, such as sync, atomic, channel, etc., which can facilitate concurrent programming.

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