How can you manage goroutines and do they all run in a single thread?

Goroutines in Go are lightweight threads managed by the Go runtime. They are not scheduled onto a single thread but are distributed across system threads (OS threads) using the Go scheduler.

Goroutine management involves:

• Creation: go func() { ... }() starts a new goroutine.
• Synchronization: channels (chan), sync.WaitGroup, mutexes, and other primitives.
• Limiting the number of concurrently running goroutines can be implemented using semaphores or buffered channels.

The Go scheduler distributes many goroutines across a pool of system threads, usually with the number of threads equal to the available CPU cores (configurable via runtime.GOMAXPROCS). Thus, goroutines can run in parallel on multiple threads, but not necessarily all on the same thread.