Why does the function Context.WithTimeout return two values, and how are they used in timeout handling?

The context.WithTimeout function in Go returns two values:

1. A new context (Context) that is automatically canceled after the specified timeout.
2. A cancel function (CancelFunc) that can be called to prematurely end work with the context.

Usage:

• The new context is used to control the execution time of operations — if the time expires, the context is canceled, and related operations receive a cancellation signal.
• The cancel function is called to free resources associated with the context if the operation finishes before the timeout.

Example:

timedCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel() // ensures resources are freed

select {
case <-doWork(timedCtx):
    fmt.Println("Work completed")
case <-timedCtx.Done():
    fmt.Println("Timeout or cancellation")
}

Thus, the returned values allow setting a time limit and controlling operation cancellation.