Min and Max Elements.

One way is to traverse the array and keep updating the min and max elements .

1. initialize min = arr[0] max = arr[o]

2. traverse the array from index 1

3. For each element:
   If element < min → update min
   If element > max → update max

4.return max and min array
5.Time Complexity: O(n)
We traverse the array once
Space Complexity: O(1)