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 article "Inside the Go Playground" describes how the playground is implemented.
The playground uses the latest stable release of Go.
To find the precise version, run this program.
The playground service is used by more than just the official Go project (Go by Example is one other instance) and we are happy for you to use it on your own site. All we ask is that you contact us first, use a unique user agent in your requests (so we can identify you), and that your service is of benefit to the Go community.