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How to check if an element is contained in an array in Swift

Theodore Kelechukwu Onyejiaku

Overview

We can check if a certain element exists in an array by using the contains() method.

Syntax

arr.contains(elem)

Parameters

arr: This is the array we want to check to see if it contains a certain element.

elem: This is the element we want to check to see if it exists in the array arr.

Return value

A Boolean value is returned. true is returned if the element elem exists in array arr. Otherwise, it returns false.

Code example

// create arrays
let gnaam = ["Google", "Netflix", "Amazon", "Apple", "Meta"]
let vowels = ["a", "e", "i", "o", "u"]
let languages = ["C", "Swift", "Java"]

// check if some elements are present
print(gnaam.contains("Facebbok"));  // false 
print(gnaam.contains("Meta"))       // true
print(vowels.contains("a"))         // true
print(vowels.contains("z"))         // false
print(languages.contains("Python")) // false
print(languages.contains("C"))      // true
Check if some elements exist in an Array in Swift

Explanation

  • In lines 2 to 4, we create the arrays gnaam, vowels, and languages.
  • In lines 7 to 12, we invoke the contains() method on the arrays we created, and pass some parameters to it. We then print the results on the console.

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swift
array
communitycreator

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Theodore Kelechukwu Onyejiaku
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