Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift Collections and Control Flow Dictionaries in Swift Modifying a Dictionary

Posted by Braydon Horcoff
Braydon Horcoff
1,107 Points

Weird output

var airport: [String: String] = ["YVR": "Vancouver Airport", "JFK": "JFK International Airport"]

print(airport["JFK"])

When I enter the above code the output is:

Optional("JFK International Airport")

Why is it printing optional? I am using a web compiler because my mac isn't with me until next week.

1 Answer

wwyattw
wwyattw
10,389 Points
wwyattw
wwyattw
10,389 Points

That's actually not wrong at all. It will be explained in later course, Optional. If you are curious, you should check the videos.