Neon Number In C#

In this blog, you will learn about a neon number program in C#.

Introduction

 

A neon number is a positive integer, which is equal to the sum of the digits of its square. 

 

For example, 9 is a neon number, because 9 squared = 81, and the sum of the digits 8 + 1 = 9, which is the same as the original number.

 

Write a program in C# to input an integer from the user, and check if that number is a Neon Number.

using System;

namespace ConsoleMultipleClass
{
    class Program
    {
        static void Main(string[] args)
        {
            Program obj = new Program();
            obj.NeonNumber();
            Console.ReadLine();
        }

        void NeonNumber()
        {
            Console.WriteLine("Enter your number to check number is neon or not");
            int input = Convert.ToInt32(Console.ReadLine());

            int temp = input * input;

            string tempString = Convert.ToString(temp);

            char[] charArray = tempString.ToCharArray();


            int sum = 0;
            for (int i = 0; i < charArray.Length; i++)
            {
                string sumTemp = Convert.ToString(charArray[i]);
                sum += Convert.ToInt32(sumTemp);
            }

            if (sum == input)
            {
                Console.WriteLine("Number is neon");
            }
            else
            {
                Console.WriteLine("Number is not neon");
            }
        }
    }
}

Summary

 

In this article, I have explained and provided examples of the neon number program in a simple way.