function selectionSort(arr) {
var len = arr.length;
for (var i = 0; i < len; i++) {
let min = i;
for (var j = i; j < len; j++) {
if(arr[min] > arr[j]){
min = j;
}
}
let temp = arr[i];
arr[i] = arr[min];
arr[min] = temp;
}
return arr;
}
console.log(selectionSort([1,5,3,2,1]))