Basic Programming C# Examples

C# Program that checks First two and last two characters are same

The Program in C# Program that checks First two and last two characters is given below:

using System;

namespace StringCheck
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello Codeauri Family, enter a string here to check if first two characters and last two characters are same:");
            string inputString = Console.ReadLine();

            bool areSame = false;
            if (inputString.Length >= 2)
            {
                string firstTwo = inputString.Substring(0, 2);
                string lastTwo = inputString.Substring(inputString.Length - 2);
                if (firstTwo == lastTwo)
                {
                    areSame = true;
                }
            }

            if (areSame)
            {
                Console.WriteLine("The first two characters and last two characters are same!");
            }
            else
            {
                Console.WriteLine("The first two characters and last two characters are not same!");
            }

            Console.ReadLine();
        }
    }
}

Output:

Hello Codeauri Family, enter a string here to check if first two characters and last two characters are same:comoco
The first two characters and last two characters are same!

Pro-Tips💡

Here are the step by step execution of above program:

  1. Imports the System namespace.
  2. Defines a namespace called StringCheck.
  3. Defines a class called Program inside the StringCheck namespace.
  4. Defines a Main method inside the Program class. This method is the entry point of the program.
  5. The program prompts the user to enter a string.
  6. Reads the input string and stores it in a variable inputString.
  7. Initializes a boolean variable areSame to false.
  8. Checks if the length of inputString is greater than or equal to 2.
  9. If the length is greater than or equal to 2, the program extracts the first two characters of inputString and stores it in firstTwo. It also extracts the last two characters of inputString and stores it in lastTwo.
  10. The program then checks if firstTwo and lastTwo are equal. If they are equal, it sets areSame to true.
  11. The program then checks the value of areSame. If areSame is true, the program prints “The first two characters and last two characters are same!”. If areSame is false, the program prints “The first two characters and last two characters are not same!”.
  12. The program waits for the user to press the Enter key before ending.

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