Swift Array swapAt()

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

The swapAt() method swaps two elements at the specified indices of the array.

Example

var numbers = [2, 6, 4, 8]

// swap 6 and 4
numbers.swapAt(1, 2)

print(numbers)

// Output: [ 2, 4, 6, 8 ]

swapAt() Syntax

The syntax of the array swapAt() method is:

array.swapAt(index1: Int, index2: Int)

Here, array is an object of the Array class.

swapAt() Parameters

The swapAt() method takes two parameters:

index1 - index of the first element to swap
index2 - index of the second element to swap

swapAt() Return Value

The swapAt() method doesn't return any value. It only swaps elements of the current array.

Example 1: Swift Array swapAt()

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

// swap "C" and "Java" 
languages.swapAt(1, 2)
print(languages)

var priceList = [12, 21, 35]

// swap 12 and 35
priceList.swapAt(0,2)
print(priceList)

Output

["Swift", "Java", "C"]
[35, 21, 12]

Here,

For the languages array, we have swapped the elements of index 1 and index 2.
Similarly, for the priceList array, we have swapped the elements of index 0 and index 2.