Learn Go in 3 Hours - Creating and Using Your Own Packages

This video tutorial covers the creation and management of packages in Go. It explains how to define and import packages, make variables and functions public or private, and avoid common issues like cyclic dependencies. The tutorial includes a practical example of creating a library package for left padding strings and integrating it into a main program. It also discusses common errors encountered during package importation and how to resolve them.

What is the main package in a Go program?

• A package that is used for testing purposes

• A package that contains utility functions

• A package that serves as the entry point of the program

• A package that is imported from the standard library

What is the purpose of the 'left pad' library created in the video?

• To implement string padding functionality

• To demonstrate how to create a package

• To show how to use the main package

• To illustrate error handling in Go

How can you make a function public in Go?

• By placing it in the main package

• By capitalizing the first letter of its name

• By declaring it at the package level

• By using a special keyword

What happens if you import a package but do not use it in Go?

• The package is automatically removed

• A syntax error occurs during compilation

• The program runs with a warning

• The package is ignored

What is a cyclic dependency in Go packages?

• When a package is imported from the standard library

• When a package is imported but not used

• When two packages import each other

• When a package imports itself

How can cyclic dependencies be resolved in Go?

• By creating a new package for shared code

• By using relative imports

• By renaming the packages

• By removing one of the imports

What is considered bad practice when importing packages in Go?

• Using relative path imports

• Importing from the standard library

• Using absolute paths

• Using package-level variables