If, elsif, else statements in Ruby - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an if statement in Ruby?

An if statement lets the program choose to run some code only when a condition is true.

beginner

How do you write an elsif in Ruby?

Use elsif to check another condition if the first if condition is false. It comes after if and before else.

beginner

What does the else part do in an if statement?

else runs code when all previous if and elsif conditions are false.

intermediate

Write a simple Ruby if-elsif-else statement that prints 'Cold', 'Warm', or 'Hot' based on a temperature variable.

Example:

temp = 30
if temp < 10
  puts 'Cold'
elsif temp < 25
  puts 'Warm'
else
  puts 'Hot'
end

intermediate

Can you have multiple elsif branches in one if statement?

Yes, you can have many elsif branches to check several conditions in order.

What will this Ruby code print?<br>

if false
  puts 'Yes'
else
  puts 'No'
end

A No

B Error

C Nothing

D Yes

Since the condition is false, the else block runs and prints 'No'.

Which keyword checks a second condition if the first if is false?

A else

B elsif

C when

D case

elsif lets you check another condition after if.

What happens if none of the if or elsif conditions are true and there is no else?

A The program crashes

B The last condition runs anyway

C No code inside runs

D It runs the first block

If no conditions match and no else exists, no code inside the statement runs.

How do you end an if statement in Ruby?

A end

B endif

C done

D finish

Ruby uses end to close if statements.

Which is the correct order in Ruby conditional statements?

A else, if, elsif

B elsif, if, else

C if, else, elsif

D if, elsif, else

The order is if, then zero or more elsif, then optional else.

Explain how if, elsif, and else work together in Ruby.

Think of it like choosing one path out of many based on conditions.

Write a Ruby example using if, elsif, and else to decide what to wear based on temperature.

Use temperature ranges to decide clothes.