Hello World

The next program prints the Hello World message on the screen (std-out).

	show "Hello World"

Run the program

to run the program, save the code in a file, for example:- hello.dgn then from the command line or terminal, run it using the Dragon Interpreter

	dragon -r hello.dgn

Multi-Line literals

Using Dragon we can write multi-line literal, see the next example

	show "
		Hello 
		Welcome to the Dragon programming language
		How are you?

	    "

you can write showln to print output on new line.

	showln "Hello"
        show "hi"

Getting Input

You can get the input from the user using the readln() method.

        select "std"
       
        showln "Enter your name" 
	a = readln()
	show "Hello " + a

No Explicit End For Statements

You don't need to use ';' or press ENTER to separate statements. The previous program can be written in one line.

        select "std"
        
        showln "Enter your name"
	a = readln()  show "Hello " + a

Writing Comments

We can write one line comments and multi-lines comments

The comment starts with //

Multi-lines comments are written between /* and */

        select "std"
       
        showln "Enter your age"                         
	a = readln()		         // print message on screen and get input from the user
	show "Age: " + a		// say hello!

	// show "Bye!"

.. note:: Using // to comment a lines of code is just a code style.