Go Basics

Print a message from main.

package main
import "fmt"
func main() {
  name := "Ada"
  fmt.Println("Hello,", name)
}

Output

Hello, Ada

Explanation

A runnable Go program uses package main and a main function. Import fmt for formatted input and output.

Explore the dry run

Guided walkthroughReady

1package main

2import "fmt"

3func main() {

4 name := "Ada"

5 fmt.Println("Hello,", name)

6}

Start to inspect the source, values, and output. These prepared steps explain the published sample; grouped loop steps describe multiple iterations.

View the complete dry-run table

Prepared trace of the published program. Some rows group repeated iterations.
Step / line	What happens	State after step	Output so far
	Declare name with inferred string type.	`name = "Ada"`	—
	Print the greeting and name with a space.	`name = "Ada"`	Hello, Ada