Ways Of Determining If A Word/String Is a Palindrome

Introduction

In the below content, you will find simple, different, yet important ways to find whether a string /word is palindrome or not.

Way 1 : Using Array. Reverse () Method

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ProgrammingInterviewFAQ.Palindrome
{
    class UsingReverseMethod {
        static void Main() {
            Console.WriteLine("Enter the String to check:");
            String input = Console.ReadLine();
            string output = string.Empty;
            char[] inputtochar = input.ToCharArray(); // this line converts the string to char for reversing
            Array.Reverse(inputtochar); // this line actually reverse the Converted CharArray
            output = new string(inputtochar); //this line converts the ReversedcharArray back to string
            if (input == output) {
                Console.WriteLine("Palidrome");
                Console.ReadLine();
            } else {
                Console.WriteLine("Not palindrome");
                Console.ReadLine();
            }
        }
    }
}using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ProgrammingInterviewFAQ.Palindrome
{
    class UsingReverseMethod {
        static void Main() {
            Console.WriteLine("Enter the String to check:");
            String input = Console.ReadLine();
            string output = string.Empty;
            char[] inputtochar = input.ToCharArray(); // this line converts the string to char for reversing
            Array.Reverse(inputtochar); // this line actually reverse the Converted CharArray
            output = new string(inputtochar); //this line converts the ReversedcharArray back to string
            if (input == output) {
                Console.WriteLine("Palidrome");
                Console.ReadLine();
            } else {
                Console.WriteLine("Not palindrome");
                Console.ReadLine();
            }
        }
    }
}

Output

Enter the string to check: Redivider

Palindrome

Enter the String to check: Karthik

Not Palindrome


Way 2: Without using Array. Reverse() Method

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ProgrammingInterviewFAQ.Palindrome
{
    class WithoutUsingReverseMethod {
        static void Main(string[] args) {
            Console.WriteLine("Enter the String to check:");
            String input = Console.ReadLine(); //getting the value(input) from user
            string output = string.Empty;
            int inputlength = input.Length; // get the length to perform loop
            for (int i = 0; i < inputlength;) {
                output += input[inputlength - 1].ToString(); //Important :Transfer one string variable to another string variable
                //At the specified index
                inputlength--; //decrease the index to get the value in reverse order
            }
            if (input == output) // finally check with input
            {
                Console.WriteLine("Palidrome");
                Console.ReadLine();
            } else {
                Console.WriteLine("Not palindrome");
                Console.ReadLine();
            }
        }
    }
}

Output

Enter the String to check: Redivider

Palindrome

Enter the String to check: Karthik

Not Palindrome

Conclusion

As a developer, even after we have experience, when it comes to preparation for an interview, there is always a necessity of taking a look at this kind of simple program. And, there are different ways of achieving the same thing. So I thought to put those in one place which we can easily go through.

In the future, I will update this blog if I get any other ways to achieve the same. The source code is in the attachment section.

I hope it will be helpful, especially for job seekers; kindly let me know your thoughts or feedback.