Inline if and unless (modifier form) in Ruby - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the inline if modifier form in Ruby?

It is a way to write an if statement at the end of a line, like: puts "Hello" if condition. The code before if runs only if the condition is true.

beginner

How does the inline unless modifier form work in Ruby?

It runs the code before unless only if the condition is false. For example: puts "No" unless condition prints "No" when the condition is false.

beginner

Rewrite this code using inline if modifier:<br>

if age >= 18
  puts "Adult"
end

puts "Adult" if age >= 18

beginner

What is the difference between inline if and inline unless?

Inline if runs code when the condition is true. Inline unless runs code when the condition is false. They are opposites.

intermediate

Can you use inline if and unless with multiple statements?

No, inline if/unless works best with single statements. For multiple lines, use regular if/unless blocks.

What does this Ruby code do?<br>

puts "Go" if ready

A Always prints "Go"

B Prints "Go" only if ready is false

C Prints "Go" only if ready is true

D Does nothing

The code prints "Go" only when the condition after if (ready) is true.

What will this code print?<br>

puts "Stop" unless moving

if moving is false.

A Prints "Stop" only if moving is true

B Prints "Stop"

C Prints nothing

D Raises an error

The code prints "Stop" only if the condition after unless (moving) is false.

Which is the correct inline if syntax?

A puts "Yes" if condition

B if condition puts "Yes"

C puts if condition "Yes"

D puts "Yes" then if condition

The inline if modifier places the condition after the statement: puts "Yes" if condition.

Can you write multiple statements after an inline if?

A Yes, inside curly braces

B Yes, separated by semicolons

C Yes, separated by commas

D No, only one statement is allowed

Inline if is meant for single statements only. Use regular if blocks for multiple statements.

What does this code do?<br>

puts "Ready" unless not_ready

A Prints "Ready" if not_ready is false

B Never prints anything

C Always prints "Ready"

D Prints "Ready" if not_ready is true

The code prints "Ready" only if the condition after unless (not_ready) is false.

Explain how the inline if modifier works in Ruby and give a simple example.

Think about writing an if statement at the end of a line.

Describe the difference between inline if and inline unless modifiers in Ruby.

Focus on when the code runs depending on the condition.