Reverse String using inbuilt method

Use the inbuilt reverse() method available for strings.
Convert the string to a list.
Call the reverse() method on the list.
Convert the list back to a string.

Below is the implementation to reverse a string using built-in methods in different programming languages:

C++

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    string str = "w3wiki"; // Input string
    reverse(str.begin(),str.end()); // Reverse the string
    cout << str << std::endl;
    return 0;
}
 
 
// This code is contributed by prajwalkandekar123.

Java

//Java program to reverse a string using StringBuffer class
 
import java.io.*;
import java.util.*;
 
class GFG {
     
    //Driver Code
    public static void main (String[] args) {
        String str = "w3wiki";//Input String
         
        //Step 1: Initialise an object of StringBuffer class
        StringBuffer sb = new StringBuffer(str);
         
        //Step 2: Invoke the .reverse() method
        sb.reverse();
         
        //Step 3: Convert the StringBuffer to string by using toString() method
        System.out.println(sb.toString());
         
    }
}
 
//This code is contributed by shruti456rawal

Python3

# Driver Code
if __name__ == '__main__':
    str = "w3wiki" # Input String
 
    # Step 1: Initialise an object of StringBuffer class
    sb = str[::-1]
 
    # Step 2: Invoke the .reverse() method (not applicable in Python)
 
    # Step 3: Print the reversed string
    print(sb)

C#

// c# code
 
using System;
 
class Program {
    static void Main(string[] args)
    {
        string str = "w3wiki"; // Input string
        char[] charArray
            = str.ToCharArray(); // Convert string to char
                                 // array
        Array.Reverse(charArray); // Reverse the array
        str = new string(
            charArray); // Convert char array back to string
        Console.WriteLine(
            str); // Output the reversed string
    }
}
// ksam24000

Javascript

let str = "w3wiki"; // Input string
str = str.split('').reverse().join(''); // Reverse the string
console.log(str);
 
// This code is contributed by Prajwal Kandekar

Output

skeegrofskeeg

Time Complexity: O(n)
Auxiliary Space: O(1) in all the programming languages except Java in which it will be, O(n) (The extra space is used to store the StringBuffer string).

String Reverse in C/C++/Java/Python/JavaScript

String reverse or reverse a string means changing the position of each character of the given string to its opposite position from end, i.e. if a character is at position 1 then its new position will be String.length, similarly if a character is at position 2 then its new position will be String.length – 1, and so on.

String Reverse in C/C++/Java/Python/JavaScript

Given a string, write a program to reverse the string.

Input: original_string[] = Geeks
Output: string_reversed[] = skeeG

Input: original_string[] = w3wiki
Output: string_reversed[] = skeeGroFskeeG

Table of Content

Reverse String using a Loop:
Reverse String using inbuilt method
Reverse String using Recursion:
Reverse String using two pointers:
String Reverse String using Stack:

Tags:

#Reverse #DSA #Strings #Reverse #Strings

Reverse String using a Loop:

Reverse String using Recursion:

Reverse String using inbuilt method

C++

Java

Python3

C#

Javascript

String Reverse in C/C++/Java/Python/JavaScript

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