# Packages and main — Go (Golang)

Source: https://www.geekswithgeeks.com/en/go/go-package-main

> Explain Packages and main, test a small program, and use the result to build confidence.

## The essential idea

**Packages and main** becomes clear when you identify its job before memorising syntax. In Go, small explicit pieces combine into programs that are easy to read, build, and change.

## See the Go path

Keep the path from source file to compiled program in mind as you learn this part.

![Go source code moving through the go tool to a running program.](assets/figures/go/go-learning-map.svg) — Figure 2.1 — A small Go idea fits into the build path.

## A useful habit

Do not copy a solution blindly. For **Packages and main**, change one value, run `go test` or `go run`, and explain why the result changed.

Quick check

**Quiz:** How should you learn Packages and main?

- [x] Run one focused example and inspect the result.
- [ ] Memorize it without writing code.
- [ ] Skip compiler and test feedback.

*Answer:* Run one focused example and inspect the result.. Small experiments reveal cause and effect.