The capacity
property returns the number of elements of the set without allocating any additional storage.
Example
var languages: Set = ["Swift", "C", "Java"]
// check if leanguages is empty or not
var result = languages.capacity
print(result)
// Output: 3
capacity Syntax
The syntax of the set capacity
property is:
set.capacity
Here, set is an object of the Set
class.
capacity Return Values
The capacity
property returns the total number of elements present in the set without allocating any additional storage.
Example 1: Swift set capacity
var names: Set = ["Gregory", "Perry", "Nadal"]
// capacity total elements on names
print(names.capacity)
var employees = Set<String>()
// capacity total elements on employees
print(employees.capacity)
Output
3 0
In the above example, since
- names contain three string elements, the property returns 3.
- employees is an empty set, the property returns 0.
The capacity
property here returns a total number of elements of names and employees without allocating new storage.
Example 2: Using capacity With if...else
var numbers: Set = [1, 2, 3]
// true because there are only 3 elements on numbers
if (numbers.capacity < 5) {
print("The set size is small")
}
else {
print("The set size is large")
}
Output
The set size is large
In the above example, we have created the set named numbers with 3 elements.
Here, since there are only 3 elements in the set, numbers.capacity < 5
evaluates to true
, so the statement inside the if
block is executed.