Hello World #

Our first program will print the classic “hello world” message. Here’s the full source code.

package main

import "fmt"

func main() {
	fmt.Println("hello world")
}

To run the program, put the code in hello-world.go and use go run.

$ go run hello-world.go
hello world

Sometimes we’ll want to build our programs into binaries. We can do this using go build.

$ go build hello-world.go
$ ls
hello-world	hello-world.go

We can then execute the built binary directly.

$ ./hello-world
hello world

Now that we can run and build basic Go programs, let’s learn more about the language.