Getting Started with Go: Essential Tips and First Hello World

The author shares initial Golang notes and a hands‑on tutorial.

Learning Go: some scattered notes from the early attempts.

Compilation and Execution

Compile and run: go run source.go Build and run:

go build source.go

Package and Imports

package main

defines an executable module.

Import required packages: import packagename Semicolons are unnecessary unless multiple statements appear on one line.

Functions

Define a function:

function functionname(){

//code

}

Command‑Line Arguments

Access arguments via os.Args or os.Args[0], where the first element is the program name.

First Hello World in Eclipse

Install the Goclipse plugin and create a simple program:

import (

"fmt"

)

func main(){

fmt.println("Hello World!")

}

The initial run produces an error (shown below):

Resolving GOPATH Issues

After moving the source to /src/main, a GOPATH‑related error appears:

Configure the project properties to add the project location to the required GOPATH:

Finally, the first program runs successfully: