C#: Create a new string using the first and last n characters from a given string of length at least n

Last update on December 20 2024 12:38:49 (UTC/GMT +8 hours)

First and Last n Characters of String

Write a C# Sharp program to create a new string using the first and last n characters from a given string of length at least n.

Visual Presentation:

Sample Solution:-

C# Sharp Code:

using System; // Importing the System namespace

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 and integer values as arguments
            Console.WriteLine(test("Hello", 1));   // Pass "Hello" and 1 as arguments to the test function
            Console.WriteLine(test("Python", 2));  // Pass "Python" and 2 as arguments to the test function
            Console.WriteLine(test("on", 1));      // Pass "on" and 1 as arguments to the test function
            Console.WriteLine(test("o", 1));       // Pass "o" and 1 as arguments to the test function
            Console.ReadLine(); // Wait for user input before closing the console window
        }

        // Function definition of test function that takes a string 's1' and an integer 'n' and returns a string
        public static string test(string s1, int n)
        {
            // Concatenate the substring of 's1' from index 0 to 'n' and the substring of 's1' from the last 'n' characters
            return s1.Substring(0, n) + s1.Substring(s1.Length - n);
        }
    }
}

Sample Output:

Ho
Pyon
on
oo

Flowchart:

C# Sharp Code Editor:

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