merge sort is also called as code example

Example 1: merge sort iterative (string)

//Joshua Khumalo
import java.util.Arrays;
public class Demo{
   public static void merge_sort(int[] my_arr){
      if(my_arr == null){
         return;
      }
      if(my_arr.length > 1){
         int mid = my_arr.length / 2;
         int[] left = new int[mid];
         for(int i = 0; i < mid; i++){
            left[i] = my_arr[i];
         }
         int[] right = new int[my_arr.length - mid];
         for(int i = mid; i < my_arr.length; i++){
            right[i - mid] = my_arr[i];
         }
         merge_sort(left);
         merge_sort(right);
         int i = 0;
         int j = 0;
         int k = 0;
         while(i < left.length && j < right.length){
            if(left[i] < right[j]){
               my_arr[k] = left[i];
               i++;
            } else {
               my_arr[k] = right[j];
               j++;
            }
            k++;
         }
         while(i < left.length){
            my_arr[k] = left[i];
            i++;
            k++;
         }
         while(j < right.length){
            my_arr[k] = right[j];
            j++;
            k++;
         }
      }
   }
   public static void main(String[] args){
      int my_arr[] = {56, 78, 91, 21, 34, 0, 11};
      int i=0;
      merge_sort(my_arr);
      System.out.println("The array after sorting is ");
      for(i=0; i

def mergeSort(arr): 
    if len(arr) >1: 
        mid = len(arr)//2 # Finding the mid of the array 
        L = arr[:mid] # Dividing the array elements  
        R = arr[mid:] # into 2 halves 
  
        mergeSort(L) # Sorting the first half 
        mergeSort(R) # Sorting the second half 
  
        i = j = k = 0
          
        # Copy data to temp arrays L[] and R[] 
        while i < len(L) and j < len(R): 
            if L[i] < R[j]: 
                arr[k] = L[i] 
                i+= 1
            else: 
                arr[k] = R[j] 
                j+= 1
            k+= 1
          
        # Checking if any element was left 
        while i < len(L): 
            arr[k] = L[i] 
            i+= 1
            k+= 1
          
        while j < len(R): 
            arr[k] = R[j] 
            j+= 1
            k+= 1
  
# Code to print the list 
def printList(arr): 
    for i in range(len(arr)):         
        print(arr[i], end =" ") 
    print() 
  
# driver code to test the above code 
if __name__ == '__main__': 
    arr = [12, 11, 13, 5, 6, 7]  
    print ("Given array is", end ="\n")  
    printList(arr) 
    mergeSort(arr) 
    print("Sorted array is: ", end ="\n") 
    printList(arr)