C#: Create a new string using first two characters of a given string

Last update on June 27 2025 13:06:18 (UTC/GMT +8 hours)

First Two Characters or Original String

Write a C# Sharp program to create a new string using the first two characters of a given string. If the string length is less than 2, return the original string.

Visual Presentation:

C# Sharp: Basic Algorithm Exercises - Create a new string using first two characters of a given string.

Sample Solution:-

C# Sharp Code:

using System; // Import the System namespace which contains fundamental types and base classes

namespace exercises // Define a namespace called 'exercises'
{
    class Program // Define a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {
            // Output the result of the test function with different strings as arguments
            Console.WriteLine(test("Hello")); // Test with the string "Hello"
            Console.WriteLine(test("Hi")); // Test with the string "Hi"
            Console.WriteLine(test("H")); // Test with the string "H"
            Console.WriteLine(test(" ")); // Test with a single space string
            Console.ReadLine(); // Wait for user input before closing the console window
        }

        // Function definition of test function that takes a string 's1' and returns a string
        public static string test(string s1)
        {
            // Check if the length of the input string 's1' is less than 2
            // If true, return the input string 's1' as it is
            // If false, return the substring of 's1' starting from index 0 up to index 1 (two characters)
            return s1.Length < 2 ? s1 : s1.Substring(0, 2);
        }
    }
}

Sample Output:

He
Hi
H

Flowchart:

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C# Sharp Code Editor:

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