C#: Check a given array of integers and return true if there is a 3 with a 5 somewhere later in the given array

Last update on December 20 2024 12:38:03 (UTC/GMT +8 hours)

Check for 3 Before 5 in Array

Write a C# Sharp program to check a given array of integers and return true if there is a 3 with a 5 somewhere later in the given array.

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 different integer arrays as arguments
            Console.WriteLine(test(new[] { 3, 5, 1, 3, 7 })); // Testing the method with an array having 3 followed by 5
            Console.WriteLine(test(new[] { 1, 2, 3, 4 })); // Testing the method with an array without 3 followed by 5
            Console.WriteLine(test(new[] { 3, 3, 5, 5, 5, 5 })); // Testing the method with an array having multiple 3s and 5s
            Console.WriteLine(test(new[] { 2, 5, 5, 7, 8, 10 })); // Testing the method with an array having 5s but no 3 followed by 5
        }           

        // Method to check if an array contains a 5 following a 3
        static bool test(int[] numbers)
        {
            bool three = false; // Variable to track if a 3 is encountered

            for (int i = 0; i < numbers.Length; i++) // Loop through the elements of the array
            {
                if (three && numbers[i] == 5) return true; // If a 5 is encountered after a 3, return true
                if (numbers[i] == 3) three = true; // If a 3 is encountered, set the 'three' flag to true
            }

            return false; // If no 5 follows a 3, return false
         }    
   } 
}

Sample Output:

True
False
True
False

Flowchart:

C# Sharp Code Editor:

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