Swift Array Programming Exercises: Swap the first and last elements of a given array of integers

Last update on June 14 2025 05:35:38 (UTC/GMT +8 hours)

Write a Swift program to swap the first and last elements of a given array of integers. Return the modified array (length will be at least 1).

Pictorial Presentation:

Sample Solution:

Swift Code:

 func swap_elements(_ a: [Int]) -> [Int] {
    var new_array = a
    let first_element = new_array.removeFirst()
    let last_element = new_array.removeLast()
    new_array.insert(last_element, at: new_array.startIndex)
    new_array.append(first_element)
    
    return new_array
}

print(swap_elements([1, 2, 3, 4]))
print(swap_elements([1, 2, 3]))
print(swap_elements([11, 12, 13, 14, 15]))

Sample Output:

[4, 2, 3, 1]
[3, 2, 1]
[15, 12, 13, 14, 11]

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