C#: Create a new string using two given strings s1, s2, the format of the new string will be s1s2s2s1

Last update on June 26 2025 13:05:00 (UTC/GMT +8 hours)

String Format s1s2s2s1

Write a C# Sharp program to create a string using the two given strings s1, s2. The new string format will be s1s2s2s1.

Visual Presentation:

Sample Solution:-

C# Sharp Code:

using System; // Import the System namespace which contains fundamental types and base classes
using System.Collections.Generic; // Import the System.Collections.Generic namespace for collections
using System.Linq; // Import the LINQ namespace for LINQ functionality
using System.Text; // Import the System.Text namespace for string manipulation
using System.Threading.Tasks; // Import the System.Threading.Tasks namespace for asynchronous operations

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 test function with two strings as arguments
            Console.WriteLine(test("Hi", "Hello")); // Test with strings "Hi" and "Hello"
            Console.WriteLine(test("whats", "app")); // Test with strings "whats" and "app"
            Console.ReadLine(); // Wait for user input before closing the console window
        }

        // Function definition of test function that takes two strings 's1' and 's2' and returns a string
        public static string test(string s1, string s2)
        {
            return s1 + s2 + s2 + s1; // Concatenate s1, s2, s2, and s1 together and return the resulting string
        }
    }
}

Sample Output:

HiHelloHelloHi
whatsappappwhats

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C# program to format a string as s2+s1+s1+s2.
• Write a C# program to create a string in the form of s1 + Reverse(s2) + s1.
• Write a C# program to create a string as the concatenation of s1, the middle char of s2, then s1.
• Write a C# program to return a string in the format: uppercase(s1) + s2 + lowercase(s1).

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