Strong Number in Windows Store App

First of all let us understand what a Strong Number is. A number is called a Strong Number if the sum of the factorials of each of its digits is equal to the number itself. In other words, the sum of the factorials of digits of a number is equal to the original number.

Example: Number 145=1!+4!+5!

In this article I explain how to create a Strong Number application in a Windows Store app.

Use the following procedure to create the Strong Number app.

Step 1

First you must create a New Window Store Application, as in:

• Open Visual Studio 2012
• "File" -> "New" -> "Project..."
• Choose Template: "Visual C#" -> "Window Store app"
• "Blank App (XAML)", then rename the application

Step 2

Write the following XAML code in "Mainpage.Xaml" (that is available in Solution Explorer):

<Page

    x:Class="Strong_Number_app.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="using:armstrong_app"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Grid Background="Blue">

        <Grid.RowDefinitions>

            <RowDefinition Height="38*"/>

            <RowDefinition Height="23*"/>

            <RowDefinition Height="31*"/>

            <RowDefinition Height="32*"/>

            <RowDefinition Height="63*"/>

            <RowDefinition Height="581*"/>

        </Grid.RowDefinitions>

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="161*"/>

            <ColumnDefinition Width="303*"/>

            <ColumnDefinition Width="902*"/>

        </Grid.ColumnDefinitions>

        <TextBlock Text="Check Number is Strong Number or not" FontFamily="Arial" FontSize="14" FontWeight="ExtraBold" Foreground="Red" Grid.Column="1" Grid.Row="1" Grid.ColumnSpan="2"></TextBlock>

        <TextBlock Text="Enter Number:" FontFamily="Arial" FontSize="15" FontWeight="ExtraBold" Foreground="Red" Grid.Column="1" Grid.Row="2"></TextBlock>

        <TextBox x:Name="Textbox1" Width="150" Height="32" VerticalAlignment="Top" Grid.Column="2" Grid.Row="2" HorizontalAlignment="Left" Grid.RowSpan="2" />

        <TextBlock Text="Number is:" FontFamily="Arial" FontSize="15" FontWeight="ExtraBold" Foreground="Red" Grid.Column="1" Grid.Row="3"></TextBlock>

        <TextBlock x:Name="text2" FontFamily="Arial" FontSize="15" FontWeight="ExtraBold" Foreground="Red" Grid.Column="2" Grid.Row="3"></TextBlock>

        <Button Content="Click" Click="Button1_click" Grid.Column="2" Grid.Row="4" FontSize="15" Foreground="Red" Background="Yellow" Width="137" Height="38" Margin="0,15,0,10" ></Button>

    </Grid>

</Page>

Step 3

Now write the following C# code for the button within "Mainpage.Xaml.cs":

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using Windows.Foundation;

using Windows.Foundation.Collections;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Controls.Primitives;

using Windows.UI.Xaml.Data;

using Windows.UI.Xaml.Input;

using Windows.UI.Xaml.Media;

using Windows.UI.Xaml.Navigation; 

namespace Strong_Number_app

{

    public sealed partial class MainPage : Page

    {

        public MainPage()

        {

            this.InitializeComponent();

        }

        protected override void OnNavigatedTo(NavigationEventArgs e)

        {

        } 

       private void Button1_click(object sender, RoutedEventArgs e)

        {           

           int num = Convert.ToInt32(Textbox1.Text);

           int sum = 0, num1;

           num1 = num;

            while (num>0)

            {

               int fact = 1;

               int r=num %10;

                for (int j = 1; j <= r; j++)

                {

                    fact = fact * j;

                }

                sum = sum + fact;

                num = num / 10;

            }

            if (sum == num1)

            {

                text2.Text = "Strong Number";

            }

            else

            {

                text2.Text = "Not Strong Number";

            }           

        }

    }

}

 

Step 4

Now Run your app.