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

Posted by Mohammad Usman
Mohammad Usman
1,856 Points

if i says that currencies [UK] = "ukCurrency" is my code is wrong ??? to assign the value for UK??

well there are different way to assign values i have two style to assign the value currencies [UK] = "ukCurrency" it showing me error in treehouse platform but work in my compiler and the other style is let ukCurrency = ["UK": "ukCurrency"] but that code will not update the currencies Dictionary.

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

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hiya,

I don't know if this should be a constant or a variable assignment (I'll assume constant), however, the code should look something like:

let ukCurrency = currencies["UK"]

Don't rely on Xcode not throwing an error to confirm your code is correct - Xcode doesn't know what you are trying to solve.

Steve.