C#: Find sum of squares of elements of a given array of numbers

Last update on June 24 2025 12:58:17 (UTC/GMT +8 hours)

Sum of Squares in Array

Write a C# Sharp program to find the sum of squares of elements in a given array of integers.

Sample Solution:

C# Sharp Code:

using System;
using System.Linq;

namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            // Array containing integers
            int[] nums = { 1, 2, 3 };

            // Displaying the sum of squares of elements in the array by calling the test method
            Console.WriteLine("Sum of squares of elements of the said array: " + test(nums));

            // Another array containing integers, including negative numbers
            int[] nums1 = { -2, 0, 3, 4 };

            // Displaying the sum of squares of elements in the second array by calling the test method
            Console.WriteLine("Sum of squares of elements of the said array: " + test(nums1));
        }

        // Method to calculate the sum of squares of elements in an array
        public static int test(int[] nums)
        {
            // Using LINQ's Sum method along with a lambda expression to calculate the sum of squares
            return nums.Sum(n => n * n);
        }
    }
}

Sample Output:

Sum of squares of elements of the said array: 14
Sum of squares of elements of the said array: 29

Flowchart:

Sample Solution-1:

C# Sharp Code:

using System;
using System.Linq;

namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            // Array containing integers
            int[] nums = { 1, 2, 3 };

            // Displaying the sum of squares of elements in the array by calling the test method
            Console.WriteLine("Sum of squares of elements of the said array: " + test(nums));

            // Another array containing integers, including negative numbers
            int[] nums1 = { -2, 0, 3, 4 };

            // Displaying the sum of squares of elements in the second array by calling the test method
            Console.WriteLine("Sum of squares of elements of the said array: " + test(nums1));
        }

        // Method to calculate the sum of squares of elements in an array using a for loop
        public static int test(int[] nums)
        {
            int squaresSum = 0; // Variable to hold the sum of squares

            // Looping through the elements of the array
            for (int i = 0; i < nums.Length; i++)
            {
                // Calculating the square of each element and adding it to the sum
                squaresSum = squaresSum + (int)Math.Pow(nums[i], 2);
            }

            return squaresSum; // Returning the sum of squares
        }
    }
}

Sample Output:

Sum of squares of elements of the said array: 14
Sum of squares of elements of the said array: 29

Flowchart:

For more Practice: Solve these Related Problems:

Write a C# program to compute the sum of squares of even numbers in an integer array.
Write a C# program to find the difference between the square of sums and the sum of squares of an array.
Write a C# program to compute the sum of squares of elements excluding the maximum and minimum values.
Write a C# program to compute the sum of squares of absolute differences between all elements in an array.

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