Run Go (Golang) Online — Free Online Go Compiler

Go (Golang) is prized for being fast, simple and easy to deploy — which is exactly why more backend interviews now ask for it. You can start learning it right now, with no local install, using the online Go compiler in GoCode.

Hello, World in Go

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")
}

Pick Go in the IDE, paste this in, and Run. GoCode compiles the program and runs the binary for you.

Reading input

Many practice problems feed data through standard input. In Go you read it with the fmt package:

package main

import "fmt"

func main() {
    var n int
    fmt.Scan(&n)
    fmt.Println(n * n)
}

Type a number into the stdin box, Run, and you'll get its square back.

Why learn Go online first

Go's toolchain is small, but skipping it entirely lets you focus on the language: goroutines, slices, maps and its clean error handling. Once you're comfortable, installing Go locally takes minutes. Open the IDE and write your first program.