Comment, Variable and Type Data on ASP.NET

1. Comment
1. Function main()
   Include command/statement that will process with computer, example
Function main() on C# languange:

static void Main (string[]args)

2. Command(statement)
   Use for commanding computer to do specific task, example
command inside C# language:

Console.WriteLine("Hello World. . .");

3. Keyword (using)
   If you use function Console.WriteLine(), you must give sign to computer
library file which recorded Console.WriteLine(). to give sign write using
System; on early of program code. command using System; indicates that user
will use all things inside library System.

4. Comment
   for including words without process with computer, you must give a comment
statement. comment usefull when the programming forget about his/her made,

// comment for 1 line


/* comment for more than 1 line*/


5. Parenthesis Brace

Parenthesis brace using for start and stop the statement, example

class Program

{
    static void Main (string[]args) // this function of main()
  {
    Console.WriteLine("Hello World. . .");
  }
}

2. Variable and Type Data
Variable is a place for keep the data. for example, when you want 
caculate block volume, long, width, height and volume from that will
saved inside variable.

Declaration of Variable is a command for computer to provide the variable
which will be used. for example user commanding computer for provide variable
of long, width, height and volume. that Variable will be use for saving data
number (integer)/

3. Rule of naming Variable
1. name of Variable consist of letters, number, and underscore "_".
2. the First character of name, must letter.
3. uppercase and lowercase is different (case Sensitive)
4. can't use Program keywords (ex. using)