Run Go 1.24 online

What's in Go 1.24

• Generic type aliases: `type Set[T comparable] = map[T]struct{}`.
• `tool` directive in go.mod pins the versions of ancillary Go tools.
• weak references and cleanup callbacks in runtime for cache-friendly code.

What you get in Go 1.24

Clicking "Run now" opens the playground with this exact code and a matching test case — passes on first Run.

package main
import "fmt"
func main(){var n int;fmt.Scan(&n);fmt.Println(n*2)}

How ls-judge runs Go 1.24

Every submission is compiled and executed inside its own Firecracker microVM — the same isolation primitive AWS Lambda uses. No shared container, no shared kernel with other users' code. The Go 1.24toolchain shipped with the microVM is the real thing (not a browser-side emulation): syscalls behave the way they do in production, and the compile / runtime behaviour matches what you would see on your own machine with that version installed.

Feed stdin from the Tests panel, watch verdicts stream per test case over a WebSocket. Free to use, no sign-up, works from any browser.