Скачать или смотреть Rotate an Array by 1 place | Array | Advanced DSA - Java | Tamil | Dry Run | Delite Coder

In this video, we are going to see how to rotate an array by 1 position to the right without using any extra space or temporary arrays. This is a commonly asked interview question in data structures and algorithms. You will learn how to shift elements in-place efficiently, using a simple logic that’s easy to dry run and implement in any programming language like Java, Python, or C++. This tutorial is especially helpful for beginners learning array manipulation techniques and preparing for coding interviews.

Algorithm (Rotate Array by 1 Place Without Extra Space):

1. Store the last element of the array in a temporary variable.
2. Start from the end of the array and shift each element one position to the right.
3. Move the element at position index minus one to the current index, starting from the end.
4. Repeat this until you reach the first index.
5. Assign the value of the temporary variable to the first index of the array.

Time Complexity:
O ( n ) — where n is the number of elements in the array. Each element is visited once.

Space Complexity:
O ( 1 )— no additional space is used; the array is modified in-place.

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