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 Basics (retired) Collections What is a Dictionary?

Posted by Oliver Howes
Oliver Howes
2,021 Points

How do I Assign the value for key "UK" to a constant named ukCurrency?

Stuck on the last task I've created a list of countries (Keys and labels) and the second question has thrown me keep looking over the video and still can't get the solution to "Assign the value for key "UK" to a constant named ukCurrency."

dictionaries.swift 
let currencies = ["US" : "Dollar", "UK" : "Pound", "JP" : "Yen"]

let ukCurrency

1 Answer

bobkingstone
bobkingstone
27,869 Points

Dictionaries use a key : value pair system, so to set the value of ukCurrency to pound, you would need to reference the key for that value, so you would use this syntax: 

    let usCurrency = currencies["US"]
    let ukCurrency = currencies["UK"]
Oliver Howes
Oliver Howes
2,021 Points

Thanks a lot, I was seriously over thinking it!