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iOS Swift Basics (retired) Collections What is a Dictionary?

Posted by Darin Wilson
Darin Wilson
996 Points

Stuck

Stuck on question 2 of 2.

I though it was

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

let ukCurrency = ("UK")

dictionaries.swift

2 Answers

James Magnavacca
James Magnavacca
20,170 Points
James Magnavacca
James Magnavacca
20,170 Points

Hi Darin! You should access the value assigned to a key in a dictionary like this: dictionary[key]. In your case currencies["UK"] .

kjvswift93
kjvswift93
13,515 Points
kjvswift93
kjvswift93
13,515 Points

The way you have written the ukCurrency constant would be the way to access a stored property or designated initializer from a class, enum, or struct, but a dictionary is a collection type thus assigning the value for one of the keys in the dictionary to a constant you must use brackets instead of parenthesis.

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

let ukCurrency = currencies["UK"]