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String slicing in Python to Rotate a String

Last Updated : 05 Mar, 2025

Given a string of size n, write functions to perform following operations on string:

• Left (Or anticlockwise) rotate the given string by d elements (where d <= n).
• Right (Or clockwise) rotate the given string by d elements (where d <= n).

For example, let's take a string s = "GeeksforGeeks" and d = 2, so for this example, our Left Rotation will be "eksforGeeksGe" and Right Rotation will be "ksGeeksforGee". Let's discuss some of the ways to do it with examples.

Python’s string slicing provides a quick way to rotate strings. The idea is to divide the string into two parts and rearrange them to get the desired rotation.

s = "GeeksforGeeks"
d = 2

# Left Rotation
left = s[d:] + s[:d]

# Right Rotation
right = s[-d:] + s[:-d]

print("Left Rotation:", left)
print("Right Rotation:", right)

Left Rotation: eksforGeeksGe
Right Rotation: ksGeeksforGee

Explanation:

• Left Rotation: Split into s[:d] (first part) and s[d:] (second part), then concatenate in reverse order.
• Right Rotation: Split into s[:-d] (first part) and s[-d:] (second part), then concatenate.

Create an extended string by concatenating 's + s' as it will cointain all possible rotations and then extract the rotated substring by slicing within the extended string.

s = "GeeksforGeeks"
d = 2

# Create extended string
ext_s = s + s
n = len(s)

# Left Rotation
left = ext_s[d:n + d]

# Right Rotation
right = ext_s[n - d: 2 * n - d]

print("Left Rotation:", left)
print("Right Rotation:", right)

Left Rotation: eksforGeeksGe
Right Rotation: ksGeeksforGee

Explanation:

• extracting a substring from index 'd to d+n' using ext_s[d:n + d] (n = length of string) will get us the 'Left Rotation'.
• similarly, extracting a substring from index 'n-d to 2n-d' using ext_s[n - d: 2 * n - d] (n = length of string) will get us the 'Right Rotation'.

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