Why packages are used in Go - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the fmt package for printing.

Go

import [1]

Drag options to blanks, or click blank then click option'

A"fmt"

B"math"

C"os"

D"net/http"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a package unrelated to printing like math or os.

Forgetting the quotes around the package name.

The fmt package is used for formatted I/O, like printing text to the console.

2fill in blank

medium

Complete the code to declare the package name for this file.

Go

package [1]

Drag options to blanks, or click blank then click option'

Ahttp

Bmain

Cos

Dfmt

Attempts:

3 left

💡 Hint

Common Mistakes

Using package names like fmt or os which are standard libraries, not the main program.

Leaving out the package declaration.

The main package is used to create an executable program in Go.

3fill in blank

hard

Fix the error in the import statement to correctly import the math package.

Go

import [1]

Drag options to blanks, or click blank then click option'

A"math"

Bmath

C'math'

D<math>

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes or no quotes around the package name.

Using angle brackets which are not valid in Go imports.

In Go, package names must be enclosed in double quotes when imported.

4fill in blank

hard

Fill both blanks to create a function that uses the fmt package to print a message.

Go

func main() {
    [1].[2]("Hello, Go packages!")
}

Drag options to blanks, or click blank then click option'

Afmt

BPrintln

CPrint

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using Print instead of Println which does not add a newline.

Using main as a package name here.

The fmt package provides the Println function to print text with a newline.

5fill in blank

hard

Fill both blanks to create a package named utils with a function that returns the sum of two integers.

Go

package [1]

func Add(a int, b int) int {
    return a [2] b
}

Drag options to blanks, or click blank then click option'

Autils

B+

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using main as the package name here.

Adding extra characters after b in the return statement.

The package is named utils. The function adds two integers using the + operator. No extra character is needed after b.