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1. Reverse a String2. Check Palindrome String3. Count Vowels in String4. Count Consonants in String5. Count Digits in String6. Remove Special Characters7. Remove Whitespace8. Find Substring9. Replace Substring10. Character Frequency11. Capitalize First Letter of Each Word12. Convert String to Title Case13. Sort String Characters14. Find Longest Word15. Find Shortest Word16. String Compression17. String Rotation18. Anagram Check19. Split and Join Strings20. Count Words in String21. Extract Numbers from String22. Validate Email Using Regex23. Validate Phone Number Using Regex24. Check Pangram25. Convert snake_case to camelCase

String Rotation in Python

Check whether one string is a rotation of another.

IntermediateString ProgramsExample 17 of 25
string-rotation.py
1# Program to check if one string is a rotation of another
2

3s1 = input("Enter first string: ")
4s2 = input("Enter second string: ")
5

6if len(s1) != len(s2):
7    print("Not rotations (different lengths).")
8else:
9    if s2 in (s1 + s1):
10        print("Strings are rotations of each other.")
11    else:
12        print("Strings are not rotations of each other.")

Output

Enter first string: ABCD
Enter second string: CDAB
Strings are rotations of each other.

What's going on

If s2 is a rotation of s1, it must appear as a substring inside s1 + s1.

After this program

If the idea is still fuzzy, read Day 4: Strings and String Methods in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 string programs, or see every topic on Python exercises.

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