What are the main advantages of using goroutines compared to traditional OS threads?

Goroutines in Go are lightweight threads managed by the Go runtime, not the operating system. The main advantages of using goroutines compared to traditional OS threads:

• Small stack size: The initial stack of a goroutine takes only a few kilobytes, unlike OS threads which typically require megabytes of memory.
• Fast creation and switching: Creating and switching between goroutines is much faster than between OS threads.
• Scalability: Thousands or even millions of goroutines can be run simultaneously without significant increase in resource consumption.
• Built-in synchronization: Go provides channels and other primitives for convenient and safe data exchange between goroutines.

Example of creating a goroutine:

 go func() {
    fmt.Println("Hello from goroutine")
}()

Thus, goroutines allow efficient use of parallelism and concurrency with lower overhead.