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Selection Sort

Certification: Basic Level Accuracy: 25% Submissions: 8 Points: 5

Write a Java program to implement the Selection Sort algorithm to sort an array of integers in ascending order.

Example 1
    

  • Input: nums = [64, 25, 12, 22, 11]
    • 

  • Output: [11, 12, 22, 25, 64]
    • 

  • Explanation:

      

    • Each pass selects the minimum element and swaps it
      • 

    

    •
Example 2
    

  • Input: nums = [5, 1, 4, 2, 8]
    • 

  • Output: [1, 2, 4, 5, 8]
    •
Constraints
    

  • 1 ≤ nums.length ≤ 10^4
    • 

  • -10^5 ≤ nums[i] ≤ 10^5
    • 

  • Time Complexity: O(n²)
    • 

  • Space Complexity: O(1)
    •
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Hint
Solution

Solution Hints

    
  
  • Divide the input array into two subarrays: sorted and unsorted.
    • 
  
  • Initially, the sorted subarray is empty and the unsorted subarray is the entire input array.
    • 
  
  • Find the smallest element in the unsorted subarray.
    • 
  
  • Swap the smallest element with the first element of the unsorted subarray.
    • 
  
  • Move the boundary between sorted and unsorted subarrays one element to the right.
    • 
  
  • Repeat until the entire array is sorted.
    •

Steps to solve by this approach:

 Step 1: Iterate through the array from index 0 to n-2 (where n is the array length).

 Step 2: For each iteration, assume the current element is the minimum.

 Step 3: Search for a smaller element in the remaining unsorted part of the array.

 Step 4: If a smaller element is found, update the minimum index.

 Step 5: After the inner loop, swap the minimum element with the element at the current position.

 Step 6: Move to the next position and repeat until the entire array is sorted.

 Step 7: The array is now sorted in ascending order.

Submitted Code :