Tell us about goroutines and how they differ from operating system threads.

Goroutines are lightweight execution threads in the Go language, managed by the Go runtime rather than the operating system. They allow running many concurrent tasks with minimal memory and context switch overhead.

Differences from OS threads:

• Lightweight: Goroutines use much less memory (usually a few kilobytes) compared to OS threads.
• Scheduling: The goroutine scheduler is built into the Go runtime and can efficiently switch execution between goroutines without OS intervention.
• Scalability: Thousands or even millions of goroutines can be run simultaneously, which is difficult with OS threads due to their higher overhead.

Example of creating a goroutine:

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

Thus, goroutines provide a convenient and efficient way of concurrent programming in Go.