Importing packages in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of importing packages in Go?

Importing packages allows you to use code written in other files or libraries, so you don't have to write everything from scratch.

beginner

How do you import a single package in Go?

Use the <code>import</code> keyword followed by the package name in quotes, like <code>import "fmt"</code>.

beginner

How do you import multiple packages in Go?

Use parentheses to group imports, like:<br><pre>import (
  "fmt"
  "math"
)</pre>

intermediate

What happens if you import a package but don't use it in Go?

Go will give a compile error because it requires all imported packages to be used. This helps keep code clean.

intermediate

How can you rename an imported package in Go?

You can give a package a new name by writing it before the package path, like <code>import io "io/ioutil"</code>. Then use <code>io</code> to refer to it.

Which keyword is used to import packages in Go?

A import

B include

C using

D require

The import keyword is used to bring packages into your Go program.

How do you import multiple packages at once?

A import ( "fmt" "math" )

B import "fmt", "math"

C import ("fmt" "math")

D import fmt math

Multiple packages are imported using parentheses with each package on its own line or separated by newlines.

What error occurs if you import a package but don't use it?

A Warning only

B No error, it's allowed

C Runtime error

D Compile error

Go requires all imported packages to be used, otherwise it gives a compile error.

How do you rename an imported package?

A import rename "package/path"

B import newname "package/path"

C import "package/path" newname

D import "package/path" as newname

You write the new name before the package path in the import statement.

Which of these is a valid import statement?

A import fmt

B import (fmt)

C import "fmt"

D import fmt "fmt"

Package names must be in quotes when imported.

Explain how to import single and multiple packages in Go with examples.

Think about how you bring in one package versus many packages.

What happens if you import a package but do not use it in your Go program? Why does Go enforce this?

Consider Go's strictness about unused code.