ruby · level 1 · unit 4 · lesson 3
- meet it
- guess first
- your turn
- fix it
- nailed it
Tap a green word if you get lost.
meet it
adds more paths to the fork.
Some questions have more than two answers. What should you wear? It depends how cold it is. elsif, short for else if, adds another condition to check when the ones above it were false.
Ruby checks from the top down and stops at the first condition that is true. Only that path runs. Stack as many elsif lines as you like, then add an else to catch the rest.
Every gives true or false. < means less than, > more than, <= less than or equal to, >= more than or equal to, and != not equal to.
temperature = 12
if temperature < 5
puts "Wear a big coat."
elsif temperature < 15
puts "A jumper will do."
endIt is spelled elsif, with no e in the middle and no space.
guess first
Big slide or small slide? Guess first.
Guess before you run it. Wrong guesses are how you learn, and nothing is marked.
height = 120
if height > 120
puts "Hop on the big slide!"
elsif height >= 100
puts "Try the small slide."
endyour turn
Your turn. How many sweets have you got?
Choose a number of sweets and a comparison sign, like < or >=, so the elsif message shows.
fix it
The top score gets no gold star. Fix the order.
- Ruby checks from the top and stops at the first
true. Which check istruefirst for 95? - 95 is at least 50, so the gold star never gets a chance. The bigger check needs to come first.
- Swap them: check
score >= 90first with its gold star, thenscore >= 50with its pass message.
nailed it
your code can pick from many paths. :D
elsifchecks a new condition when the ones above werefalse.- Ruby stops at the first
truecondition. <,>,<=,>=,==and!=all givetrueorfalse.
new words in your collection
- elsif
- comparison
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