Swift Array Programming Exercises: Create an array of length 2 containing the middle two elements from a given array of integers and even length 2 or more

Swift Array Programming: Exercise-17 with Solution

Write a Swift program to create an array of length 2 containing the middle two elements from a given array of integers and even length 2 or more.

Pictorial Presentation:

Sample Solution:

Swift Code:

func middle_elements(_ a: [Int]) -> [Int] {
    var new_array: [Int] = []
    
    if a.count % 2 == 0
      {
        let second_Index = a.count / 2
        let first_Index = second_Index - 1
        new_array = [a[first_Index], a[second_Index]]
      }
       return new_array
}

print(middle_elements([1, 2, 3, 4])) 
print(middle_elements([5, 6, 7, 8, 9, 10]))
print(middle_elements([5, 6, 7, 8, 9, 10, 11]))
print(middle_elements([1, 2]))

Sample Output:

[2, 3]
[7, 8]
[]
[1, 2]

Swift Programming Code Editor:

Improve this sample solution and post your code through Disqus

Previous: Write a Swift program to compute the sum of the values of two given array of integers and each length 2. Find the array which has the largest sum and return the first array if the sum of two given arrays are equal.
Next:Write a Swift program to test if an array of length four containing all their elements from two given array (each length two) of integers,.