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

JUDY TRAN
JUDY TRAN
709 Points
Posted by JUDY TRAN
JUDY TRAN
709 Points

cannot get the value

I have created a contact ukCurrency and assigned it to UK value. And trying to access to the value....

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hello Judy:

In a dictionary you have a key and a value, in order for you to access the value of a dictionary you have to use it's key.

So for example :

// Let's create a dictionary of cars
let cars = ["Key 1":"Ford Fiesta","Key 2":"BMW X5", "Key 3":"Audi S4"]

// Now let's access a car by using it's corresponding key.
cars["Key 1"]

// With this key, I am getting "Ford Fiesta".

/*
   Ok so now let's say that you want to go riding a car.
   This is capturing the value of "Key 2" and assigning it to a constant named bmw.
*/

let bmw = cars["Key 2"]

// Now you can use this constant in other places, for example. 
println("JUDY likes to ride his new \(bmw)")

This will print JUDY likes to ride his new BMW X5.

Hope this explanation helps you understand a bit better and solve your challenge.

Good luck