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Learn how to use a slice that steps backwards to reverse a string in Python. See examples, explanations and a function to reverse any string.
- Reverse A String in Python Using A Loop
- Reverse A String in Python Using Recursion
- Reverse String in Python Using Stack
- Reverse String in Python Using An Extended Slice
- Reverse String in Python Using reversed() Method
- Reverse String in Python Using List Comprehension
- Reverse String in Python Using The Function Call
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In this example, we call a function to reverse a string, which iterates to every element and intelligently joins each character in the beginningso as to obtain the reversed string. Time complexity: O(n) Auxiliary Space: O(1) Implementation:
The string is passed as an argument to a recursive functionto reverse the string. In the function, the base condition is that if the length of the string is equal to 0, the string is returned. If not equal to 0, the reverse function is recursively called to slice the part of the string except the first character and concatenate the first character ...
An empty stackis created. One by one character of the string is pushed to the stack. One by one all characters from the stack are popped and put back to a string. Time complexity: O(n) Auxiliary Space: O(n) Implementation:
Extended slice offers to put a “step” field as[start, stop, step], and giving no field as start and stop indicates default to 0 and string length respectively, and “-1” denotes starting from the end and stop at the start, hence reversing a string. Time complexity: O(n) Auxiliary Space: O(1) Implementation:
The reversed()returns the reversed iterator of the given string and then its elements are joined empty string separated using join(). And reversed order string is formed. Time complexity: O(n) Auxiliary Space: O(n) Implementation:
List comprehension creates the list of elements of a string in reverse order and then its elements are joined using join(). And reversed order string is formed. Time complexity: O(n) Auxiliary Space: O(1) Implementation:
Function to reverse a string by converting string to list then reversed it and again convert it to string. Time complexity: O(n) Auxiliary Space: O(1) Implementation:
Learn how to reverse a string in Python using loops, recursion, stack, extended slice, reversed method, list comprehension and function call. Compare the time complexity and auxiliary space of each method with examples and code.
- 7 min
Learn how to reverse strings in Python using slicing, reversed(), join(), iteration, recursion, and more. This tutorial covers various tools and techniques for working with strings in reverse order.
May 31, 2009 · Learn different ways to reverse a string in Python, using slicing, join, or a custom function. See examples, explanations, and tips for handling Unicode and performance issues.
- Using slicing : >>> 'hello world'[::-1] 'dlrow olleh' Slice notation takes the form [start:stop:step] . In this case, we omit the start and stop p...
- @Paolo's s[::-1] is fastest; a slower approach (maybe more readable, but that's debatable) is ''.join(reversed(s)) .
- What is the best way of implementing a reverse function for strings? My own experience with this question is academic. However, if you're a pro loo...
- This answer is a bit longer and contains 3 sections: Benchmarks of existing solutions, why most solutions here are wrong , my solution . The existi...
- Quick Answer (TL;DR) Example ### example01 ------------------- mystring = 'coup_ate_grouping' backwards = mystring[::-1] print(backwards) ### .....
- 1. using slice notation def rev_string(s): return s[::-1] 2. using reversed() function def rev_string(s): return ''.join(reversed(s)) 3. us...
- A lesser perplexing way to look at it would be: string = 'happy' print(string) 'happy' string_reversed = string[-1::-1] print(string_reversed) 'y...
- Reverse a string in python without using reversed() or [::-1] def reverse(test): n = len(test) x="" for i in range(n-1,-1,-1): x += test[...
- This is also an interesting way: def reverse_words_1(s): rev = '' for i in range(len(s)): j = ~i # equivalent to j = -(i + 1) rev += s[...
Mar 3, 2023 · Learn six different ways to reverse a string in Python, with pros and cons of each method. Find out the best and fastest way to reverse a string using string indexing.
Mar 20, 2023 · You can use the slice function to reverse the string in 1 line of code. Alternatively, use a For loop or the reversed () function for additional flexibility in the reversal process. You can also use the join () function or a list to make a string backwards. This wikiHow guide shows 6 tricks to reverse a string in Python.
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May 24, 2022 · In this short guide, learn how to reverse a string in Python, with practical code examples and best practices - using the slice notation with a negative step, a for loop, a while loop, join() and reversed().
