If we wanted to add a new key-value to a dictionary, we could use the following subscript syntax:

dictionaryName[NewKey] = NewValue

It is important to note that when adding new dictionary elements, the new key and value must match the data types of the dictionary it is being added to or else we will get an error.

Let’s say we created a dictionary donutPrices:

var donutPrices = [
  "Strawberry": 2,
  "Chocolate": 3
]

We could add a third element to donutPrices using the following code:

donutPrices["Boston Cream"] = 4

If we were to print() the value of donutPrices our output would be something like:

["Strawberry": 2, "Chocolate": 3, "Boston Cream": 4]