Logic Building/Phase 5 - Category 5: Advanced String Logic/Program

Check String Rotation

Check if one string is rotation of another.

Logic BuildingAdvanced

Logic Building

# Take two strings
s1 = input("Enter first string: ")
s2 = input("Enter second string: ")

# Check rotation
if len(s1) == len(s2):
    # Concatenate s1 with itself
    temp = s1 + s1
    if s2 in temp:
        print("Rotation")
    else:
        print("Not a rotation")
else:
    print("Not a rotation (different lengths)")

Output

Enter first string: hello
Enter second string: lohel
Rotation

Concatenate string with itself and check substring.

Key Concepts:

Check if lengths equal
Concatenate s1 with itself
Check if s2 is substring

Find Most Frequent Character

Longest Common Prefix