In Swift, the count property can be used to get the size of a hash (or a Dictionary). The count property returns the number of key-value pairs in the hash. Here's an example code snippet showing how to get the size of a hash with an example:
// Define a hash with key-value pairs
var hash = ["a": 1, "b": 2, "c": 3]
// Get the size of the hash using the count property
let size = hash.count
// Print the size of the hash
print("The size of the hash is \(size)")
// Output: The size of the hash is 3
In the example above, we created a hash hash with three key-value pairs, then we used the count property to get the size of the hash, which is 3. Finally, we printed the size of the hash using a print() statement.