C#: Check whether a given string starts with 'C#' or not

Last update on June 25 2025 13:03:12 (UTC/GMT +8 hours)

Starts with 'C#'

Write a C# Sharp program to check whether a given string starts with 'C#' or not.

Visual Presentation:

C# Sharp: Basic Algorithm Exercises - Check if a given string starts with 'C#' or not.

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)
        {
            // Calling the 'test' method with different strings and displaying the returned values
            Console.WriteLine(test("C# Sharp")); // Output: True
            Console.WriteLine(test("C#"));       // Output: True
            Console.WriteLine(test("C++"));      // Output: False
            Console.ReadLine();                  // Keeping the console window open
        }

        // Method to test conditions based on the given string
        public static bool test(string str)
        {
            // Check if the length of the string is less than 3 and it equals "C#"
            // or if the string starts with "C#" and the third character is a space ' '
            return (str.Length < 3 && str.Equals("C#")) || (str.StartsWith("C#") && str[2] == ' ');
        }
    }
}

Sample Output:

True
True
False

Flowchart:

For more Practice: Solve these Related Problems:

Write a C# program to check if a string starts with either 'C#', 'VB#', or 'F#'.
Write a C# program to determine if a string starts with 'C#' and ends with '.NET'.
Write a C# program that returns true only if the string starts with 'C#' but does not contain 'Java'.
Write a C# program to count how many strings in a list start with 'C#'.

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