C#: Return true if there are two values 15, 15 next to each other in an array

Last update on June 28 2025 12:53:05 (UTC/GMT +8 hours)

Check for Two 15's Next to Each Other

Write a C# Sharp program to check a given array (length will be at least 2) of integers and return true if there are two values 15, 15 next to each other.

Visual Presentation:

Sample Solution:

C# Sharp Code:

using System; // Importing the System namespace

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {               
            // Outputting the result of the 'test' method with various integer arrays
            Console.WriteLine(test(new[] { 5, 5, 1, 15, 15 })); 
            Console.WriteLine(test(new[] { 15, 2, 3, 4, 15 })); 
            Console.WriteLine(test(new[] { 3, 3, 15, 15, 5, 5 })); 
            Console.WriteLine(test(new[] { 1, 5, 15, 7, 8, 15 })); 
        }               

        // Method to check if an array has consecutive occurrences of number 15
        static bool test(int[] numbers)
        {
            for (int i = 0; i < numbers.Length - 1; i++) // Loop through the array
            {
                if (numbers[i + 1] == numbers[i] && numbers[i] == 15) // Checking if two consecutive elements are both 15
                {
                    return true; // If found, return true
                }
            }
            return false; // If the loop completes without finding two consecutive 15s, return false
        }
    } 
}

Sample Output:

True
False
True
False

Flowchart:

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