In what situations does automatic switching of execution occur when using goroutines?

Automatic switching of execution between goroutines in Go occurs in the following situations:

• When a goroutine calls a function that blocks execution, such as reading from a channel, writing to a channel, or a system call that blocks the thread.
• When the runtime.Gosched() function is called, which explicitly yields control to the scheduler to switch to another goroutine.
• When a goroutine finishes, the scheduler switches to another ready-to-run goroutine.

The Go runtime contains a scheduler that distributes the execution of goroutines across available system threads (M). Switching occurs automatically to efficiently utilize the CPU and avoid blocking the entire program when waiting for I/O operations or synchronization.