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# Check if a string can be obtained by rotating another string 2 places

• Difficulty Level : Easy
• Last Updated : 15 Apr, 2021

Given two strings, the task is to find if a string can be obtained by rotating another string two places.

Examples:

Input: string1 = “amazon”, string2 = “azonam”
Output: Yes
// rotated anti-clockwise
Input: string1 = “amazon”, string2 = “onamaz”
Output: Yes
// rotated clockwise

```1- There can be only two cases:
a) Clockwise rotated
b) Anti-clockwise rotated

2- If clockwise rotated that means elements
are shifted in right.
So, check if a substring[2.... len-1] of
string2 when concatenated with substring[0,1]
of string2 is equal to string1. Then, return true.

3- Else, check if it is rotated anti-clockwise
that means elements are shifted to left.
So, check if concatenation of substring[len-2, len-1]
with substring[0....len-3] makes it equals to
string1. Then return true.

4- Else, return false.```

Below is the implementation of the above approach.

## C++

 `// C++ program to check if a string is two time``// rotation of another string.``#include``using` `namespace` `std;` `// Function to check if string2 is obtained by``// string 1``bool` `isRotated(string str1, string str2)``{``    ``if` `(str1.length() != str2.length())``        ``return` `false``;``    ``if``(str1.length()<2){``      ``return` `str1.compare(str2) == 0;``    ``}``    ``string clock_rot = ``""``;``    ``string anticlock_rot = ``""``;``    ``int` `len = str2.length();` `    ``// Initialize string as anti-clockwise rotation``    ``anticlock_rot = anticlock_rot +``                    ``str2.substr(len-2, 2) +``                    ``str2.substr(0, len-2) ;` `    ``// Initialize string as clock wise rotation``    ``clock_rot = clock_rot +``                ``str2.substr(2) +``                ``str2.substr(0, 2) ;` `    ``// check if any of them is equal to string1``    ``return` `(str1.compare(clock_rot) == 0 ||``            ``str1.compare(anticlock_rot) == 0);``}` `// Driver code``int` `main()``{``    ``string str1 = ``"geeks"``;``    ``string str2 = ``"eksge"``;` `    ``isRotated(str1, str2) ? cout << ``"Yes"``                          ``: cout << ``"No"``;``    ``return` `0;``}`

## Java

 `// Java program to check if a string is two time``// rotation of another string.` `class` `Test``{``    ``// Method to check if string2 is obtained by``    ``// string 1``    ``static` `boolean` `isRotated(String str1, String str2)``    ``{``        ``if` `(str1.length() != str2.length())``            ``return` `false``;``        ``if``(str1.length() < ``2``)``        ``{``            ``return` `str1.equals(str2);``        ``}``     ` `        ``String clock_rot = ``""``;``        ``String anticlock_rot = ``""``;``        ``int` `len = str2.length();``     ` `        ``// Initialize string as anti-clockwise rotation``        ``anticlock_rot = anticlock_rot +``                        ``str2.substring(len-``2``, len) +``                        ``str2.substring(``0``, len-``2``) ;``     ` `        ``// Initialize string as clock wise rotation``        ``clock_rot = clock_rot +``                    ``str2.substring(``2``) +``                    ``str2.substring(``0``, ``2``) ;``     ` `        ``// check if any of them is equal to string1``        ``return` `(str1.equals(clock_rot) ||``                ``str1.equals(anticlock_rot));``    ``}``    ` `    ``// Driver method``    ``public` `static` `void` `main(String[] args)``    ``{``        ``String str1 = ``"geeks"``;``        ``String str2 = ``"eksge"``;``     ` `        ``System.out.println(isRotated(str1, str2) ?  ``"Yes"``                              ``: ``"No"``);``    ``}``}`

## Python3

 `# Python 3 program to check if a string``# is two time rotation of another string.` `# Function to check if string2 is``# obtained by string 1``def` `isRotated(str1, str2):` `    ``if` `(``len``(str1) !``=` `len``(str2)):``        ``return` `False``    ` `    ``if``(``len``(str1) < ``2``):``        ``return` `str1 ``=``=` `str2``    ``clock_rot ``=` `""``    ``anticlock_rot ``=` `""``    ``l ``=` `len``(str2)` `    ``# Initialize string as anti-clockwise rotation``    ``anticlock_rot ``=` `(anticlock_rot ``+` `str2[l ``-` `2``:] ``+``                                     ``str2[``0``: l ``-` `2``])``    ` `    ``# Initialize string as clock wise rotation``    ``clock_rot ``=` `clock_rot ``+` `str2[``2``:] ``+` `str2[``0``:``2``]` `    ``# check if any of them is equal to string1``    ``return` `(str1 ``=``=` `clock_rot ``or``            ``str1 ``=``=` `anticlock_rot)` `# Driver code``if` `__name__ ``=``=` `"__main__"``:``    ` `    ``str1 ``=` `"geeks"``    ``str2 ``=` `"eksge"``if` `isRotated(str1, str2):``    ``print``(``"Yes"``) ``else``:``    ``print``(``"No"``)` `# This code is contributed by ita_c`

## C#

 `using` `System;` `// C# program to check if a string is two time``// rotation of another string.` `public` `class` `Test {``    ``// Method to check if string2 is obtained by``    ``// string 1``    ``public` `static` `bool` `isRotated(``string` `str1, ``string` `str2)``    ``{``        ``if` `(str1.Length != str2.Length) {``            ``return` `false``;``        ``}` `        ``if` `(str1.Length < 2) {``            ``return` `str1.Equals(str2);``        ``}` `        ``string` `clock_rot = ``""``;``        ``string` `anticlock_rot = ``""``;``        ``int` `len = str2.Length;` `        ``// Initialize string as anti-clockwise rotation``        ``anticlock_rot``            ``= anticlock_rot``              ``+ str2.Substring(len - 2, len - (len - 2))``              ``+ str2.Substring(0, len - 2);` `        ``// Initialize string as clock wise rotation``        ``clock_rot = clock_rot + str2.Substring(2)``                    ``+ str2.Substring(0, 2);` `        ``// check if any of them is equal to string1``        ``return` `(str1.Equals(clock_rot)``                ``|| str1.Equals(anticlock_rot));``    ``}` `    ``// Driver code``    ``public` `static` `void` `Main(``string``[] args)``    ``{``        ``string` `str1 = ``"geeks"``;``        ``string` `str2 = ``"eksge"``;` `        ``Console.WriteLine(isRotated(str1, str2) ? ``"Yes"``                                                ``: ``"No"``);``    ``}``}` `// This code is contributed by Shrikant13`

## Javascript

 ``

Output:

`Yes`

Exercise : Check if string2 is obtained by rotating string1 by k places.

Reference : https://www.careercup.com/question?id=5734821229756416
This article is contributed by Sahil Chhabra. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.