C#: Create a new string from a given string. If the first or first two characters is 'a', return the string without those 'a' otherwise return the original given string

Last update on June 27 2025 13:09:16 (UTC/GMT +8 hours)

Remove First Two 'a's if Present

Write a C# Sharp program to create a new string from a given string. Return the string without the first or first two 'a' characters otherwise return the original string.

Visual Presentation:

C# Sharp: Basic Algorithm Exercises - Create a new string from a given string.

Sample Solution:-

C# Sharp Code:

using System; // Importing the System namespace

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {
            // Output the results of the test function with different strings as arguments
            Console.WriteLine(test("abcab")); // Pass "abcab" to the test function and display the result
            Console.WriteLine(test("python")); // Pass "python" to the test function and display the result
            Console.WriteLine(test("aacda")); // Pass "aacda" to the test function and display the result
            Console.WriteLine(test("jython")); // Pass "jython" to the test function and display the result
            Console.ReadLine(); // Wait for user input before closing the console window
        }

        // Function definition of the test function that takes a string 's1' as input and returns a string
        public static string test(string s1)
        {
            // If the length of 's1' is 1 and the only character is "a", remove that character
            if (s1.Length == 1 && s1.Substring(0, 1) == "a")
            {
                s1 = s1.Remove(0, 1);
            }

            // If the length of 's1' is greater than 1, perform the following checks:
            if (s1.Length > 1)
            {
                // If the second character is "a", remove it
                if (s1.Substring(1, 1) == "a")
                {
                    s1 = s1.Remove(1, 1);
                }

                // If the first character is "a", remove it
                if (s1.Substring(0, 1) == "a")
                {
                    s1 = s1.Remove(0, 1);
                }
            }

            return s1; // Return the modified or unchanged 's1'
        }
    }
}

Sample Output:

bcab
python
cda
jython

Flowchart:

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