iOS Development Stage 4 Question

iOS Development with Swift Stage 4: Collections

Challenge Task1:

Let's create a dictionary that contains the currencies of the various countries along with their country codes. The country code will be the key and the currency the value. Using the following key-value pairs: US : Dollar, UK : Pound, JP : Yen assign them to a constant named currencies.

Answer:

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

This answer is seen as correct by program

Challenge Task 2:

Assign the value for key "UK" to a constant named ukCurrency.

Answer:

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

In the example shown by Amit he used the declaration ‘removeValueForKey’…which I assume would look like the below:

let ukCurrency = currencies.removeValueForKey("UK")

And this would work if the constant ‘currencies’ was a variable but the program results in error asking “currencies needs to be a constant’.

Can anyone help me here? I’m at a loss.

Thanks, Tony