About the Playground

The Go Playground is a web service that runs on golang.org's servers. The service receives a Go program, compiles, links, and runs the program inside a sandbox, then returns the output.

There are limitations to the programs that can be run in the playground:

• The playground can use most of the standard library, with some exceptions; notably absent are network and file system access. Therefore, the only communication a playground program has to the outside world is by writing to standard output and standard error.
• In the playground the time begins at 2009-11-10 23:00:00 UTC (determining the sigificance of this date is an exercise for the reader). This makes it easier to cache programs by giving them deterministic output.
• There are also limits on execution time and on CPU and memory usage, and the program is restricted to running in a single thread (but may use many goroutines).

The playground uses the latest stable release of Go.
To find the precise version, run this program.