In this article, we will learn about the solution to the problem statement given below.
Problem statement− We are given an array, we need to sort it using the concept of recursive insertion sort.
Insertion sort works on creating a parallel array in which we manually insert the elements in the specified order.
Now let’s observe the solution in the implementation below −
Example
# recursive way
def insertionSortRecursive(arr,n):
# base case
if n<=1:
return
# Sort
insertionSortRecursive(arr,n-1)
last = arr[n-1]
j = n-2
# move ahead
while (j>=0 and arr[j]>last):
arr[j+1] = arr[j]
j = j-1
arr[j+1]=last
# main
arr = [1,5,3,4,8,6,3,4,5]
n = len(arr)
insertionSortRecursive(arr, n)
print("Sorted array is:")
for i in range(n):
print(arr[i],end=" ")Output
Sorted array is : 1 3 3 4 4 5 5 6 8
All the variables are declared in the local scope and their references are seen in the figure above.
Conclusion
In this article, we have learned about how we can make a Python Program for Recursive Insertion Sort