C#: Check whether the sum of all 5' in the array exactly 15 in a given array of integers

Last update on June 28 2025 12:53:14 (UTC/GMT +8 hours)

Sum of 5's Equals 15

Write a C# Sharp program to check if the sum of all 5' in the array is exactly 15 in a given array of integers.

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[] { 1, 5, 6, 9, 10, 17 })); // Testing the method with an array
            Console.WriteLine(test(new[] { 1, 5, 5, 5, 10, 17 })); // Testing the method with another array
            Console.WriteLine(test(new[] { 1, 1, 5, 5, 5, 5 })); // Testing the method with a third array
        }   

        // Method to check if the sum of all occurrences of number 5 in the array is equal to 15
        static bool test(int[] nums)
        {
            int sum = 0;

            // Looping through the array
            for (int i = 0; i < nums.Length; i++)
            {
                // Checking if the current element is 5
                if (nums[i] == 5)
                {
                    sum += 5; // Incrementing sum by 5 for each occurrence of 5 in the array
                }
            }

            // Returning true if the sum of all occurrences of number 5 in the array is equal to 15, else false
            return sum == 15;
        }
    } 
}

Sample Output:

False
True
False

Flowchart:

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