C#: Create a new string which contain the n copies of the first 3 characters of a given string

Last update on June 25 2025 13:03:05 (UTC/GMT +8 hours)

n Copies of First Three Characters

Write a C# Sharp program to create a string that is n (non-negative integer) copies of the first 3 characters of a given string. If the given string is shorter than 3, return n copies of the string.

Visual Presentation:

Sample Solution:-

C# Sharp Code:

using System;

// Namespace declaration
namespace exercises
{
    // Class declaration
    class Program
    {
        // Main method - entry point of the program
        static void Main(string[] args)
        {
            // Displaying the output of the 'test' method with different string inputs and integers
            Console.WriteLine(test("Python", 2));  // Output: PytPyt
            Console.WriteLine(test("Python", 3));  // Output: PytPytPyt
            Console.WriteLine(test("JS", 3));      // Output: JSJSJS
            Console.ReadLine();                    // Keeping the console window open
        }

        // Method to generate a string that repeats the first few characters 'n' times
        public static string test(string s, int n)
        {
            var result = string.Empty;   // Initialize an empty string to store the resulting string
            var frontOfString = 3;      // Define the number of characters to repeat

            // Check if the defined number of characters to repeat exceeds the length of the input string
            if (frontOfString > s.Length)
                frontOfString = s.Length;  // Adjust the number of characters to repeat to the length of the input string

            var front = s.Substring(0, frontOfString);  // Extract the specified number of characters from the beginning of the input string

            // Loop 'n' times to concatenate the extracted characters to the result string
            for (var i = 0; i < n; i++)
            {
                result += front;  // Concatenate the extracted characters 'n' times to the result string
            }
            return result;  // Return the resulting concatenated string
        }
    }
}

Sample Output:

PytPyt
PytPytPyt
JSJSJS

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C# program to generate a string consisting of n copies of the first 3 characters and the last 2 characters of a given string.
• Write a C# program to generate n repetitions of the first three characters of a string, ignoring any whitespace characters.
• Write a C# program to return n copies of the substring formed by the first vowel and its succeeding two characters from a given string.
• Write a C# program to repeat the first 3 characters of a string n times and alternate them with dashes.

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