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Selection Sort in Javascript

Selection Sort in Javascript

Comparing each with the rest and swapping if greater ones are found.

Time Complexity

  • Best: Ω(n^2)
  • Average: θ(n^2)
  • Worst: O(n^2)
function selectionSort(arr){
  let min;
  let i;
  let j;
  let temp;
  console.log("Input Array");
  console.log(arr);
  for (i = 0; i < arr.length-1; i++) {
    min = i;
    for (j = i+1; j < arr.length; j++) {
      console.log(arr[i], arr[j]);
      if (arr[j] < arr[min]) {
        console.log(arr[j]);
        min = j;
      }
    }
    if (min !== i) {
      temp = arr[min];
      arr[min] = arr[i];
      arr[i] = temp;
      console.log(arr);
    } 
  }
  console.log("Sorted using Selection Sort");
  return arr
}
console.log(selectionSort([5,7,6,9,8,2,1,4,3]));
// console.log(selectionSort([1,2,3,4,5,6,7,8,9])); // uncomment to try best case, i.e. sorted

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