C#: Check whether a given string starts with 'F' or ends with "B"

Last update on June 25 2025 13:03:58 (UTC/GMT +8 hours)

Fizz, Buzz, FizzBuzz

Write a C# Sharp program to check whether a given string begins with "F" or ends with "B".
If the string starts with "F" return "Fizz" and return "Buzz" if it ends with "B" If the string starts with "F" and ends with "B" return "FizzBuzz".
In other cases return the original string.

Visual Presentation:

C# Sharp: Basic Algorithm Exercises - Check whether a given string starts with 'F' or ends with 'B'.

Sample Solution:-

C# Sharp Code:

using System;
using System.Linq;

namespace exercises
{
    // Class declaration
    class Program
    {
        // Main method - entry point of the program
        static void Main(string[] args)
        {
            // Calling the 'test' method with different strings and printing the results
            Console.WriteLine(test("FizzBuzz"));  // Output: FizzBuzz
            Console.WriteLine(test("Fizz"));      // Output: Fizz
            Console.WriteLine(test("Buzz"));      // Output: Buzz
            Console.WriteLine(test("Founder"));   // Output: Founder
            Console.ReadLine(); // Keeping the console window open
        }

        // Method to determine the output based on specific conditions in the input string
        public static string test(string str)
        {
            // Check if the string starts with "F" and ends with "B"
            if (str.StartsWith("F") && str.EndsWith("B"))
            {
                return "FizzBuzz";  // If both conditions are true, return "FizzBuzz"
            }
            // Check if the string starts with "F"
            else if (str.StartsWith("F"))
            {
                return "Fizz";      // If the string starts with "F", return "Fizz"
            }
            // Check if the string ends with "B"
            else if (str.EndsWith("B"))
            {
                return "Buzz";      // If the string ends with "B", return "Buzz"
            }
            else
            {
                return str;         // Return the original string if none of the conditions are met
            }
        }
    }
}

Sample Output:

Fizz
Fizz
Buzz
Fizz

Flowchart:

For more Practice: Solve these Related Problems:

Write a C# program to return "Fizz" if a string contains more vowels than consonants, "Buzz" otherwise.
Write a C# program that returns "Fizz" if a string starts and ends with the same character, otherwise "Buzz".
Write a C# program to return "FizzBuzz" if the string contains both uppercase and lowercase letters.
Write a C# program to return "Fizz" if the first letter is a digit and "Buzz" if the last is a digit.

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