Find largest, second largest smallest and second smallest number from array in swift.

// Define an array of integers
var inputArray: [Int] = [1, 3, 8, 9, 2, 0]

// Initialize variables to store largest and second largest elements
var largestElement: Int = inputArray[0]
var secondLargestElement: Int = largestElement

// Initialize variables to store smallest and second smallest elements
var smallestElement: Int = inputArray[0]
var secondSmallestElement: Int = smallestElement

// Find largest and second largest number from array in Swift
for (index, object) in inputArray.enumerated() {
    // Check if current element is greater than the largestElement
    if object > largestElement {
        // Update secondLargestElement to previous largestElement
        secondLargestElement = largestElement
        // Update largestElement to current object
        largestElement = object
    } else if object < largestElement &amp;&amp; object > secondLargestElement {
        // Update secondLargestElement if current object is between largest and second largest
        secondLargestElement = object
    }
}

// Find smallest and second smallest number from array in Swift
for (index, object) in inputArray.enumerated() {
    // Check if current element is smaller than the smallestElement
    if object < smallestElement {
        // Update secondSmallestElement to previous smallestElement
        secondSmallestElement = smallestElement
        // Update smallestElement to current object
        smallestElement = object
    } else if object > smallestElement &amp;&amp; object < secondSmallestElement {
        // Update secondSmallestElement if current object is between smallest and second smallest
        secondSmallestElement = object
    }
}

// Print the results
print("Largest element: \(largestElement)")
print("Second largest element: \(secondLargestElement)")
print("Smallest element: \(smallestElement)")
print("Second smallest element: \(secondSmallestElement)")

Comments Explanation:

1. Initialization of Variables:
   • inputArray: Contains the array of integers.
   • largestElement, secondLargestElement: Variables to store the largest and second largest elements initialized with the first element of inputArray.
   • smallestElement, secondSmallestElement: Variables to store the smallest and second smallest elements initialized with the first element of inputArray.
2. Finding Largest and Second Largest:
   • Loop through inputArray using enumerated() to get both index and object.
   • Check if object is greater than largestElement. If true, update secondLargestElement and largestElement.
   • If object is not greater than largestElement but is greater than secondLargestElement, update secondLargestElement.
3. Finding Smallest and Second Smallest:
   • Another loop through inputArray to find the smallest and second smallest elements.
   • Check if object is smaller than smallestElement. If true, update secondSmallestElement and smallestElement.
   • If object is not smaller than smallestElement but is smaller than secondSmallestElement, update secondSmallestElement.
4. Printing Results:
   • Finally, print the values of largestElement, secondLargestElement, smallestElement, and secondSmallestElement.