How to Split an Array and Add First Part to End in Python

Submitted by razormist on Sunday, May 10, 2026 - 23:27.

In this tutorial, we will learn how to program "How to Split an Array and Add First Part to End in Python". The objective is to split an array and add the first part to the end. This tutorial will guide you step by step through the process of splitting an array. By the end of this tutorial, you will have a solid understanding of how to implement this solution effectively in Python, helping you strengthen your problem-solving abilities and improve your coding skills.

This topic is straightforward and easy to understand. By following the instructions provided, you will be able to complete it with ease. The program will guide you step by step through the process of splitting an array and adding the first part to the end. So, let’s dive into the coding process!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

from collections import deque
 
# MAIN LOOP
while True:
    print("\n============= Split an Array and Add First Part to End =============\n")
 
    # Input handling
    try:
        user_input = input("Enter array elements (space-separated): ").strip()
 
        if not user_input:
            print("Input cannot be empty.")
            continue
 
        arr = [int(x) for x in user_input.split()]
 
    except ValueError:
        print("Invalid input. Please enter integers only.")
        continue
 
    try:
        k = int(input("Enter number of elements to move: "))
 
        if len(arr) == 0:
            print("Array cannot be empty.")
            continue
 
        k = k % len(arr)
 
    except ValueError:
        print("Invalid value for k.")
        continue
 
    print(f"\nOriginal array: {arr}")
 
    # Rotate array
    d = deque(arr)
    d.rotate(-k)
 
    result = list(d)
 
    print(f"Updated array:  {result}")
 
    # Try Again Option
    opt = input("\nDo you want to try again? (yes/no): ").strip().lower()
 
    if opt == 'no':
        print("Exiting program...")
        break
    elif opt != 'yes':
        print("Invalid choice. Exiting program...")
        break

This Python program splits an array and moves the first part to the end using the `deque` data structure from the `collections` module. It allows users to input an array of integers and specify how many elements should be moved from the beginning to the end. The program efficiently performs the rotation using the `rotate()` method, then displays both the original and updated arrays. It also includes input validation and runs interactively, allowing users to repeat the process or exit.

Output:

There you have it we successfully created How to Split an Array and Add First Part to End in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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