What should be done if zero is received from an int channel?

Receiving zero from an int channel when it is closed indicates that the channel is empty. In this case, the second return value from the <-ch operation will be false.

// Create a channel
ch := make(chan int, 1)
ch <- 1 // Send a value

// Read the value
val, ok := <-ch
// val = 1, ok = true

close(ch) // Close the channel

// Read from the closed channel
val, ok = <-ch
// val = 0, ok = false - we get zero because the channel is empty after closing

It is necessary to check the second return value (ok) when reading from a channel to determine whether the value was received before the channel was closed or if it is a "zero" value after closure.

// Example handling
value, open := <-channel
if !open {
	// Channel is closed and empty
	// Actions related to termination can be performed here
} else {
	// Value was successfully received before closure
	// Process the value
}