Closed channel
A closed channel is a Go channel that accepts no further sends while allowing receives to complete, including delivery of buffered values.
Learn Concurrent Programming with Go
A closed channel is a Go channel marked as unable to accept further sends while still allowing pending or zero-valued receives.
- How it is used
- Coordinates producer completion with receivers and prevents closed inputs from dominating multi-channel select loops.
- How deep it goes
- Explains closure behavior, receive flags, range termination, and nil-channel select disabling, while stopping short of deeper runtime internals.
- Examples
- Uses a three-message receiver, a range loop, and a sales-and-expenses accounting application with independently closing channels.
- What you can do after
- Apply it via Go channel receive flags, range loops, and nil-channel select cases to terminate receivers and combine closing inputs.
Read how Learn Concurrent Programming with Go explains closed channel →
Learn Go with Pocket-Sized Projects
A closed channel is a Go channel on which no further sends are permitted and receives can continue until buffered values are exhausted.
- How it is used
- Coordinates goroutine shutdown after a concurrent maze solver finds its solution.
- How deep it goes
- Defines receive behavior, irreversibility, and multi-goroutine notification, then applies closure to stop exploration.
- Examples
- Uses a quit channel to stop maze explorers after treasure discovery.
- What you can do after
- Apply it via Go channel operations to notify multiple goroutines without sending one message per worker.
Read how Learn Go with Pocket-Sized Projects explains closed channel →
Related concepts
- close functionproduced by · In Go, close is a built-in function that marks a channel closed, preventing further sends and allowing receivers to detect completion.
- default valueproduces · A default value is a predefined or automatically supplied value used when an expected input, argument, field, or configuration setting is omitted or unspecified.
- select statementused by · A select statement is a language construct that retrieves selected data or chooses among alternative operations or cases according to the language's rules.
- channelkind of · A channel is a medium, mechanism, or pathway through which information or messages are conveyed between participants or endpoints.
- sentinel valuealternative to · A sentinel value is a distinguished value interpreted as signaling a special condition, such as a boundary, termination, absence, or exceptional result.
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