Display Number From 1 to 100 Without Loop in Windows Store App

Introduction

Today I am describing a very simple but interesting thing. Because we always print number from 1 to 100 using a loop. But someone asked me how to print these numbers without using a loop. Really at that time I had no idea although I proceeded to do it. I finally got the idea to use recursion (in which a method calls itself) and print the number.

Use the following procedure to implement it.

Step 1

First of all you have to create a new Windows Store Application, as in:

• Open Visual Studio 2012
• "File" -> "New" -> "Project..."
• Choose "Template" -> "Visual C#" -> "Window Store app"
• Choose "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="number_app.MainPage"

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

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

xmlns:local="using:number_app"

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

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

mc:Ignorable="d">

<Grid Background="Red">

<Grid.RowDefinitions>

<RowDefinition Height="116*"/>

<RowDefinition Height="45*"/>

<RowDefinition Height="518*"/>

<RowDefinition Height="89*"/>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="215*"/>

<ColumnDefinition Width="479*"/>

<ColumnDefinition Width="200*"/>

</Grid.ColumnDefinitions>

<TextBlock Text="Display Number from 1 to 100 without loop" FontSize="20" FontWeight="ExtraBold" FontFamily="Arial" Grid.Column="1" Grid.Row="1" Grid.ColumnSpan="2"></TextBlock>

<TextBlock x:Name="text1" FontSize="20" FontWeight="ExtraBold" FontFamily="Arial" Grid.Column="1" Grid.Row="2" HorizontalAlignment="Left" Width="722" TextWrapping="Wrap" Margin="0,0,0,40"></TextBlock>

</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 number_app

{

public sealed partial class MainPage : Page

{

public MainPage()

{

this.InitializeComponent();

}

protected override void OnNavigatedTo(NavigationEventArgs e)

{

number(1);

}

public void number(int num)

{

if(num <=100)

{

text1.Text += num.ToString() + " ";

number(num + 1);

}

}

}

}

Step 4

Run your app and see the output.