CSharp – for Statement
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int number = 5;
for(int i = 0; i < number; i++)
Console.WriteLine(i);
// the console will close if you press Return on the keyboard
Console.ReadLine();
}
}
}
The result is:
0
1
2
3
4
CSharp – while Statement
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int number = 0;
while(number < 5)
{
Console.WriteLine(number);
number = number + 1;
}
// the console will close if you press Return on the keyboard
Console.ReadLine();
}
}
}
The result is:
0
1
2
3
4
CSharp – Switch Statement
The switch statement is like a set of if statements. It’s a list of possibilities, with an action for each possibility, and an optional default action, in case nothing else evaluates to true.
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
int caseSwitch = 1;
switch (caseSwitch)
{
case 1:
Console.WriteLine("Case 1");
break;
case 2:
Console.WriteLine("Case 2");
break;
// if case 1 and case 2 are false:
default:
Console.WriteLine("Default case");
break;
}
} // End Main()
}
}
How to create a loop:
...
case 4:
while (true)
Console.WriteLine("Endless looping. . . .");
...
CSharp – if Statement
With if statement you can set up conditional blocks of code.
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
Console.Write("Enter a character: ");
char ch = (char)Console.Read();
if (Char.IsUpper(ch))
{
Console.WriteLine("The character is an uppercase letter.");
}
else if (Char.IsLower(ch))
{
Console.WriteLine("The character is a lowercase letter.");
}
else if (Char.IsDigit(ch))
{
Console.WriteLine("The character is a number.");
}
else
{
Console.WriteLine("The character is not alphanumeric.");
}
} // End Main()
}
}
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
Console.Write("Enter a character: ");
char c = (char)Console.Read();
if (Char.IsLetter(c))
{
if (Char.IsLower(c))
{
Console.WriteLine("The character is lowercase.");
}
else
{
Console.WriteLine("The character is uppercase.");
}
}
else
{
Console.WriteLine("The character isn't an alphabetic character.");
}
} // End Main()
}
}
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
// Change the values of these variables to test the results.
bool Condition1 = true;
bool Condition2 = true;
bool Condition3 = true;
bool Condition4 = true;
if (Condition1)
{
// Condition1 is true.
}
else if (Condition2)
{
// Condition1 is false and Condition2 is true.
}
else if (Condition3)
{
if (Condition4)
{
// Condition1 and Condition2 are false. Condition3 and Condition4 are true.
}
else
{
// Condition1, Condition2, and Condition4 are false. Condition3 is true.
}
}
else
{
// Condition1, Condition2, and Condition3 are false.
}
} // End Main()
}
}
using System;
namespace ConsoleApplication1
{
class Program
{
static void Main()
{
// NOT
bool result = true;
if (!result)
{
Console.WriteLine("The condition is true (result is false).");
}
else
{
Console.WriteLine("The condition is false (result is true).");
}
// Short-circuit AND
int m = 9;
int n = 7;
int p = 5;
if (m >= n && m >= p)
{
Console.WriteLine("Nothing is larger than m.");
}
// AND and NOT
if (m >= n && !(p > m))
{
Console.WriteLine("Nothing is larger than m.");
}
// Short-circuit OR
if (m > n || m > p)
{
Console.WriteLine("m isn't the smallest.");
}
// NOT and OR
m = 4;
if (!(m >= n || m >= p))
{
Console.WriteLine("Now m is the smallest.");
}
// Output:
// The condition is false (result is true).
// Nothing is larger than m.
// Nothing is larger than m.
// m isn't the smallest.
// Now m is the smallest.
} // End Main()
}
}
My Website: http://www.lucedigitale.com
References:
http://msdn.microsoft.com/it-it/library/5011f09h.aspx
http://csharp.net-tutorials.com/basics/if-statement/
CSharp – ArrayList
To use ArrayList you need: using System.Collections;
using System;
using System.Collections; // class for ArrayList
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
// <type> <name of the list> = new ArrayList()
ArrayList list = new ArrayList();
// add an element
list.Add("Mario");
list.Add("Luca");
list.Add("Giovanni");
// per ogni elemento nella lista
foreach (string name in list)
Console.WriteLine(name);
Console.ReadLine();
}
}
}
The result is:
Mario
Luca
Giovanni
Complete Reference: http://msdn.microsoft.com/it-it/library/system.collections.arraylist(v=vs.110).aspx
