selectionSort.swift

var randomNumbers = [5, 4, 3, 2, 1]

func selectionSort(nums: inout [Int]) -> [Int] {
    
    // index of element we're trying to put in the leftmost position
    for i in 0..<nums.count - 1 {
        
        // set our smallest element to be the current index's element 
        var smallestElement = nums[i]
        // set our smallest index to be the current index's element 
        var smallestIndex = i
        
        // iterating through the rest of the array not including the outer loop's index 
        for j in (i + 1)..<nums.count  {
            if nums[j] < smallestElement {
                smallestElement = nums[j]
                smallestIndex = j
            }            
        }
        
        // perform the swap between the smallest element and the current outer loop index element 
        let temp = nums[i]
        nums[i] = nums[smallestIndex]
        nums[smallestIndex] = temp    
    }
    
    return nums
}

print(selectionSort(nums: &randomNumbers))