Discovering Go: Chapter First Steps in the Language

Starting my journey with the Go language, I decided to share my learnings. This is the first in a series of introductory Go tutorials.

How Go works

Go is a compiled language. When executing the compilation command, the source code (files with extension .go) is translated into machine language.

For direct execution, the run command is ideal for quick tests. For programs with continuous use or in production, the command build generates an executable binary.

Structure of a Go Program

All Go code is organized into packages, similar to libraries or modules in other languages ​​(although different from the package structure in Java, for example). A package consists of one or more files .go in the same directory.

Each file starts with the package declaration (e.g. package main).

Then the imports, using the import keyword, declares the required external packages. Just like in other languages, we use packages for specific tasks. The Go compiler is strict, preventing compilation if there are missing or unnecessary imports, ensuring only the essentials are included.

Functions are declared with func, followed by the name and parameters (if any): func nomeDaFuncao(parâmetros) { ... }.

Basic Syntax

Go generally dispenses with semicolons at the end of lines, except when two or more instructions are on the same line.

Line breaks indicate the end of an instruction. The opening braces { of a function must be on the same line as the declaration: func main() {.

Hello, World

package main

import "fmt"

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

Next Steps

Did you like the content? Leave your comment or share your experience with Go! In the next chapters, we will explore more examples to consolidate learning.

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