GO Playground

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The Go Playground is a web service that runs on golang.org's servers. The service receives a Go program, vets, compiles, links, and runs the program inside a sandbox, then returns the output. If the program contains tests or examples and no main function, the service runs the tests. The playground can use most of the standard library, with some exceptions. The only communication a playground program has to the outside world is by writing to standard output and standard error.