It's not letting me "removeValueForKey" for the constant "currencies". In Xcode, it lets me remove the value if I....

You can not remove values from constants. That is the point of a constant. If you want to make the dictionary editable, it has to be a variable type.

That's what I was saying - I changed it to a variable in Xcode and everything worked. However, in this course - it doesn't let me change it to a variable. For some reason, the course wants it to still be a constant and therefore gives me an error saying that it needs to be one. I think that it's a glitch in the learning program. Is there any way to fix this?

I'm having the same problem. Is there we can still progress regardless if they get that fixed or not?

I figured this out - instead of "removeValueForKey", I simply assigned the variable - if that makes sense. So here is a hint - your solution does not include editing your constant array - but rather using your constant array.

sorry i just figured that i can

// define a new variable and assign it the same value as the constant currencies

var currenciesOne = currencies

// then proceed with

let ukCurrency = currenciesOne.removeValueForKey("UK")

While it is true that in Xcode you can simply go back and change the "let" to a "var" so as to change it from a constant to a variable - that is not what the question is actually asking us to do. It's asking us to use the constant to help define the new constant. Does that make sense? I understand that I'm speaking ambiguously - but it feels SO good to grab something on your own instead of just being told what to do. Hit me back up if you just want the answer.

Thanks Levi, My method worked and i passed the challenge. I'm sure will find another hurdle soon. Good Luck

Awesome! Good luck to you, as well!