We’ve created models of real-life objects using instances and now let’s find out how to customize them. Since instances of a struct can have different property values, we should know how to access these values. In Swift, we use dot syntax to do just that:

instance.property

This might look familiar from other exercises like trying to find .count of a collection type. That’s because .count is also a property, that’s right we’ve used properties before!

Let’s turn back to our trusty Dog structure:

struct Dog {
  var age = 0
  var isGood = true
}

var bucket = Dog()

Notice that we added a Dog instance, bucket who still has the structure’s default properties and values. To check bucket‘s properties, we use dot syntax as mentioned earlier:

print(bucket.age)    // Prints: 0
print(bucket.isGood) // Prints: true

Awesome, we were able to access property values! We can also reassign properties using the assignment operator (=). Suppose bucket is 7 years old and he is being a bad boy, we can reassign the values, like so:

bucket.age = 7
bucket.isGood = false