Get Random Element from Set in Swift

Swift – Get Random Element from Set

To get random element from given Set in Swift, call randomElement() method on this Set. randomElement() returns an element that is picked randomly from this Set.

Examples

In the following example, we take set fruits, and get a random element from this set using Set.randomElement() method.

main.swift

let fruits: Set = ["apple", "banana", "cherry", "mango"]
if let element = fruits.randomElement() {
    print("Random Element : \(element)")
}

Output

Random Element : banana
Program ended with exit code: 0

If the set is empty, randomElement() returns nil.

main.swift

let fruits = Set<Int>()
let element = fruits.randomElement()
print("Random Element : \(element)")

Output

Random Element : nil
Program ended with exit code: 0

Conclusion

In this Swift Tutorial, we learned how to get a random element from given Set using Set.randomElement() method.