Inline if and unless (modifier form) in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print 'Hello' only if the condition is true using inline if.

Ruby

puts 'Hello' [1] condition

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

Aunless

Bif

Cwhile

Duntil

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'unless' instead of 'if' will run the code when the condition is false.

Using 'while' or 'until' here is incorrect because they are for loops.

The inline if modifier is used as 'puts "Hello" if condition' to execute the code only when condition is true.

2fill in blank

medium

Complete the code to skip printing 'Goodbye' if the condition is true using inline unless.

Ruby

puts 'Goodbye' [1] condition

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

Awhile

Bif

Cunless

Duntil

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'if' will run the code when the condition is true, which is the opposite of what is needed.

Using 'while' or 'until' is incorrect here because they are for loops.

The inline unless modifier runs the code only if the condition is false, so 'puts "Goodbye" unless condition' skips printing when condition is true.

3fill in blank

hard

Fix the error in the code to print 'Done' only if the variable 'finished' is true using inline if.

Ruby

puts 'Done' [1] finished == true

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

Aunless

Bwhile

Cuntil

Dif

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'unless' will run the code when 'finished == true' is false, which is incorrect here.

Using 'while' or 'until' causes syntax errors in this context.

Using 'if' after the statement runs it only when 'finished == true' is true, which is the correct inline if usage.

4fill in blank

hard

Fill both blanks to print 'Alert!' only if 'warning' is true and skip if 'safe' is true using inline modifiers.

Ruby

puts 'Alert!' [1] warning [2] safe

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

Aif

Bunless

Cwhile

Duntil

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'unless' with 'warning' will invert the logic incorrectly.

Using 'if' with 'safe' will run code when safe is true, which is opposite of skipping.

The code prints 'Alert!' if 'warning' is true and skips printing if 'safe' is true, so 'if' goes with 'warning' and 'unless' with 'safe'.

5fill in blank

hard

Fill all three blanks to print 'Success' only if 'passed' is true, skip if 'failed' is true, and repeat while 'retry' is true using inline modifiers.

Ruby

puts 'Success' [1] passed [2] failed [3] retry

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

Aif

Bunless

Cwhile

Duntil

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing 'if' and 'unless' incorrectly changes logic.

Using 'until' instead of 'while' changes loop condition.

The code prints 'Success' if 'passed' is true (if), skips if 'failed' is true (unless), and repeats while 'retry' is true (while).