Swift Set first

In this tutorial, we will learn about the Swift Set first property with the help of examples.

The first property returns the first element of the set.

Example

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


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


print(result!)

// Output: Swift

first Syntax

The syntax of the set first property is:

set.first

Here, set is an object of the Set class.

first Return Values

The first property returns the first element of set.

Notes:

  • The first property returns an optional value, so we need to unwrap it. There are different techniques to unwrap optionals. To learn more about optionals, visit Swift Optionals.
  • Since sets are unordered, we will get different values from the first property.

Example: Swift set first

var names: Set = ["Gregory", "Perry", "Nadal"]


// return first element of names
print("First Name of set: ", names.first!) 


var even: Set = [2, 4, 6, 8, 10]


// check first element of even
print("First Even Number:", even.first!)

Output

First Name of set: Perry
First Even Number: 6

In the above example, the first element returns the first element of names and even respectively.

Since the sets are unordered, the first element can be any element of the sets. So the first property returns a random element from names and even.

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