Comments and documentation in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a single-line comment in Ruby.

Ruby

[1] This is a comment

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

A#

B!

C//

D--

Attempts:

3 left

💡 Hint

Common Mistakes

Using // or -- which are comment symbols in other languages.

Forgetting to add any symbol before the comment text.

In Ruby, single-line comments start with the # symbol.

2fill in blank

medium

Complete the code to add a multi-line comment using =begin and =end in Ruby.

Ruby

=begin
[1]
This is a multi-line comment.
=end

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

AIgnore this text

BThis is not a comment

CCode goes here

DThis is a comment

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving the text empty between =begin and =end.

Using code instead of comment text inside the block.

Text between =begin and =end is treated as a multi-line comment in Ruby.

3fill in blank

hard

Fix the error in the comment syntax below.

Ruby

[1]

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

A# This is a comment in Ruby

B-- This is a comment in Ruby

C/* This is a comment in Ruby */

D=begin This is a comment =end

Attempts:

3 left

💡 Hint

Common Mistakes

Using comment symbols from other languages like // or /* */.

Trying to use multi-line comment syntax for a single line.

Ruby uses # for single-line comments, not //.

4fill in blank

hard

Fill both blanks to create a method with a comment describing its purpose.

Ruby

# [1]
def greet(name)
  puts "Hello, #{name}!"
end

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

AThis method prints a message

BThis method greets a person

CThis method calculates sum

DThis method sorts a list

Attempts:

3 left

💡 Hint

Common Mistakes

Writing comments unrelated to the method's purpose.

Leaving the comment blank.

The comment describes that the method greets a person.

5fill in blank

hard

Fill all three blanks to add a multi-line comment explaining the code.

Ruby

=begin
[1]
[2]
[3]
=end
def add(a, b)
  a + b
end

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

AThis method adds two numbers

BIt takes two inputs

Cand returns their sum

DThis method multiplies two numbers

Attempts:

3 left

💡 Hint

Common Mistakes

Writing incorrect descriptions about the method.

Using single-line comment syntax inside multi-line comment block.

The multi-line comment explains the method's purpose, inputs, and output clearly.