Hi everyone,
Today I’m gonna share about simple tutorial how to create hello world in golang.
Go is a statically typed, compiled high-level programming language designed at Google by Robert Griesemer, Rob Pike, and Ken Thompson. It is syntactically similar to C, but also has memory safety, garbage collection, structural typing, and CSP-style concurrency. Wikipedia
So, if you want to read more information about golang, you can find out in this website https://go.dev/
Back to the tutorial, I assumed that you already installed golang into your operating system or you might not want to install it, then you can use the playground of golang.
First of all, you need to create directory for project golang. Here, I add golang for the name of directory or folder.
mkdir golang
After that, you should created module for project of golang. This means for tracking the dependencies that you are installed.
go mod init hello-world
Once you run that command, it will automatically generate new file which name is go.mod
module hello-world
go 1.22.5
Next, create a new file for your main code of your project. I will create main.go
package main
import "fmt"
func main() {
fmt.Println("Hello World")
}
Each project on golang only have one package main. So, I will set the main.go as a package main project. Then, I used library fmt from golang to print out some data on the console.
Then, I create function main to print out Hello World.
So, the result like the image below.
Let’s add some library and you will know how to install the library on the golang project.
You can find some package on pkg.go.dev . Here, I will install quote package.
I’ll update my main.go like this.
package main
import "fmt"
import "rsc.io/quote"
func main() {
fmt.Println(quote.Go())
}
I used rsc.io/quote for generate quote and then call the function inside of the Println.
Then, try to run the program.
Unfortunately, we got some error that the modules not yet installed. So we can use the suggestion command to install the package or use this command
go get rsc.io/quotego mod tidy
After you run the command one of them, it will automatically created a new file go.sum and also update the go.mod, like this.
go.mod
module hello-world
go 1.22.5
require (
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c // indirect
rsc.io/quote v1.5.2 // indirect
rsc.io/sampler v1.3.0 // indirect
)
go.sum
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:qgOY6WgZOaTkIIMiVjBQcw93ERBE4m30iBm00nkL0i8=
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
rsc.io/quote v1.5.2 h1:w5fcysjrx7yqtD/aO+QwRjYZOKnaM9Uh2b40tElTs3Y=
rsc.io/quote v1.5.2/go.mod h1:LzX7hefJvL54yjefDEDHNONDjII0t9xZLPXsUe+TKr0=
rsc.io/sampler v1.3.0 h1:7uVkIFmeBqHfdjD+gZwtXXI+RODJ2Wc4O7MPEh/QiW4=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
After that, just run the program again on the you’ll the result like this.
Okeee, that’s all the introduction for hello world in golang.
References
#Tutorial #Golang #HelloWorld