String slicing in Python to rotate a string
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).
Examples:
Input : s = "GeeksforGeeks"
d = 2
Output : Left Rotation : "eksforGeeksGe"
Right Rotation : "ksGeeksforGee"
Input : s = "qwertyu"
d = 2
Output : Left rotation : "ertyuqw"
Right rotation : "yuqwert"
We have existing solution for this problem please refer Left Rotation and Right Rotation of a String link. We will solve this problem quickly in python using String Slicing. Approach is very simple,
- Separate string in two parts first & second, for Left rotation Lfirst = str[0 : d] and Lsecond = str[d :]. For Right rotation Rfirst = str[0 : len(str)-d] and Rsecond = str[len(str)-d : ].
- Now concatenate these two parts second + first accordingly.
# Function to rotate string left and right by d length def rotate(input,d): # slice string in two parts for left and right Lfirst = input[0 : d] Lsecond = input[d :] Rfirst = input[0 : len(input)-d] Rsecond = input[len(input)-d : ] # now concatenate two parts together print "Left Rotation : ", (Lsecond + Lfirst) print "Right Rotation : ", (Rsecond + Rfirst) # Driver program if __name__ == "__main__": input = 'GeeksforGeeks' d=2 rotate(input,d) |
chevron_right
filter_none
Output:
Left Rotation : eksforGeeksGe Right Rotation : ksGeeksforGee
Recommended Posts:
- String slicing in Python to check if a string can become empty by recursive deletion
- Python | Reverse Slicing of given string
- Python | Get the substring from given string using list slicing
- Program to cyclically rotate an array by one in Python | List Slicing
- Python | Check if given string can be formed by concatenating string elements of list
- Python | Check if string ends with any string in given list
- Python | Sorting string using order defined by another string
- Python | Check if a given string is binary string or not
- Python List Comprehension and Slicing
- Python | Custom slicing in List
- Python | Variable list slicing
- Interesting facts about strings in Python | Set 2 (Slicing)
- Python | Alternate range slicing in list
- Python Slicing | Extract ‘k’ bits from a given position
- Python Slicing | Reverse an array in groups of given size
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.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
