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Explain the use of sync.Mutex and sync.WaitGroup in Go for managing concurrent processes?

The use of sync.Mutex and sync.WaitGroup in Go for managing concurrent processes are as follows:

**sync.Mutex** is a type in the **sync** package that provides a way to synchronize access to shared resources in a concurrent environment. It works by allowing only one Goroutine at a time to access a shared resource, preventing race conditions and data races.

To use **sync.Mutex**, you create a new instance of the type and call its **Lock()** method before accessing the shared resource, and call its **Unlock()** method after accessing the shared resource, like this:

var mutex = &sync.Mutex{}

func accessSharedResource() {
    mutex.Lock()
    defer mutex.Unlock()
    // access shared resource here
}

In this example, **mutex** is a pointer to a new instance of **sync.Mutex**. The **Lock()** method is called to acquire the lock on the mutex, and the **defer** keyword is used to ensure that the **Unlock()** method is called after the Goroutine finishes accessing the shared resource.

**sync.WaitGroup** is another type in the **sync** package that provides a way to wait for a group of Goroutines to finish executing before continuing the program. It works by maintaining a counter that is incremented when a new Goroutine is started, and decremented when a Goroutine finishes executing.

To use **sync.WaitGroup**, you create a new instance of the type, call its **Add()** method to increment the counter before starting a new Goroutine, call its **Done()** method to decrement the counter when a Goroutine finishes executing, and call its **Wait()** method to block until the counter reaches zero, like this:

var wg = &sync.WaitGroup{}

func myGoroutine() {
    defer wg.Done()
    // do some work here
}

func main() {
    for i := 0; i < 10; i++ {
        wg.Add(1)
        go myGoroutine()
    }
    wg.Wait()
    // all Goroutines have finished executing here
}

In this example, **wg** is a pointer to a new instance of **sync.WaitGroup**. The **Add()** method is called to increment the counter before starting a new Goroutine, and the **Done()** method is called using the **defer** keyword to decrement the counter when the Goroutine finishes executing. The **Wait()** method is called at the end of the **main()** function to block until all Goroutines have finished executing.

**sync.Mutex** and **sync.WaitGroup** are two powerful tools that can be used together to manage concurrent processes in Go, ensuring that shared resources are accessed in a synchronized and thread-safe manner, and that all Goroutines have finished executing before continuing the program.

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