Swift Set max()

In this tutorial, we will learn about the Swift set max() method with the help of examples.

The max() method returns the maximum element in the set.


var numbers: Set = [9, 34, 11, -4, 27]

// find the largest number print(numbers.max()!)
// Output: 34

max() Syntax

The syntax of the set max() method is:


Here, set is an object of the Set class.

max() Parameters

The max() method doesn't take any parameters.

max() Return Values

  • returns the maximum element from the set

Note: The max() method 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.

Example 1: Swift set max()

// create set of integers
var integers: Set = [2, 4, 6, 8, 10]

// create set of floating-point number
var decimals: Set = [1.2, 3.4, 7.5, 9.6]

// find the largest element in integers set print(integers.max())
// find the largest element in decimals set print(decimals.max()!)



In the above example, we have created two sets named integers and decimals. Notice the following:

  • integers.max() - since we have not unwrapped the optional, the method returns Optional(10)
  • decimals.max()! - since we have used ! to force unwrap the optional, the method returns 9.6.

To learn more about forced unwrapping, visit Optional Forced Unwrapping.

Example 2: Find Largest String Using max()

var languages = ["Swift", "Python", "Java"]

// find the largest string print(languages.max()!)



Here, the elements in the languages set are strings, so the max() method returns the largest element (alphabetically).

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