Swift Set isEmpty

var languages: Set = ["Swift", "C", "Java"]

// check if languages is empty or not
var result = languages.isEmpty

print(result)

// Output: false

isEmpty Syntax

The syntax of the set isEmpty property is:

set.isEmpty 

Here, set is an object of the Set class.

isEmpty Return Values

The isEmpty property returns:

• true - if the set does not contain any elements
• false - if the set contains some elements

Example 1: Swift set isEmpty

var names: Set = ["Alcaraz", "Sinner", "Nadal"]

// check if names is empty or not
print(names.isEmpty)  

var employees = [String]()

// check if employees is empty or not
print(employees.isEmpty)

Output

false
true

In the above example, since

• names contain three string elements, the property returns false.
• employees is an empty set, the property returns true.

Example 2: Using isEmpty With if...else

var names: Set = ["Federer", "Thiem"]

// false because names contains three elements
if (names.isEmpty) {

  print( "Set is empty")
}

else {

  print("Elements:", names)
}

Output

Elements: ["Federer", "Thiem"]

Here, the names set is not empty, so the if block is skipped and the else block is executed.