C#: Check whether a given string contain the character 'z' from 2 to 4 times

Last update on June 25 2025 13:04:04 (UTC/GMT +8 hours)

Contains 2-4 'z' Characters

Write a C# Sharp program to check if a given string contains between 2 and 4 'z' characters.

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 strings
            Console.WriteLine(test("frizz")); // Output: True
            Console.WriteLine(test("zane"));  // Output: True
            Console.WriteLine(test("Zazz"));  // Output: False
            Console.WriteLine(test("false")); // Output: False
            Console.WriteLine(test("zzzz"));  // Output: True
            Console.WriteLine(test("ZZZZ"));  // Output: False
            Console.ReadLine();              // Keeping the console window open
        }

        // Method to check if the input string contains 'z' from 2 to 4 times
        public static bool test(string str)
        {
            int ctr = 0; // Counter to store the number of occurrences of 'z'

            // Loop through each character in the input string
            for (int i = 0; i < str.Length; i++)
            {
                // Check if the current character is 'z'
                if (str[i] == 'z')
                {
                    ctr++; // Increment the counter if the character is 'z'
                }
            }

            // Return true if the count of 'z' is greater than 1 and less than or equal to 4, otherwise return false
            return ctr > 1 && ctr <= 4;
        }
    }
}

Sample Output:

True
False
True
False
True
False

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C# program to check if a given string contains exactly 3 'z' or 'Z' characters, case-insensitively.
• Write a C# program to count the number of 'z' characters and return true if the count is a prime number between 2 and 7.
• Write a C# program that returns true if the number of 'z' characters is within 2 to 4 and the total string length is at least 6.
• Write a C# program to check whether a given string contains at least one pair of consecutive 'z' characters and no more than four total.

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