Getting Started - Third Style
Hello World
The next program prints the Hello World message on the screen (std-out).
load "stdlib.ring"
print("Hello World")
Run the program
to run the program, save the code in a file, for example : hello.ring then from the command line or terminal, run it using Ring
ring hello.ring
Create Executable File
Using Ring2EXE we can create executable file for our application
ring2exe hello.ring -static
The -static option will avoid the need to ring.dll|ring.so|ring.dylib
But since the stdlib.ring load libraries like (LibCurl, OpenSSL, MySQL, etc)
You will need these libraries!
To avoid the need to these libraries (If you don’t need stdlib classes)
Use stdlibcore.ring instead of stdlib.ring as in the next example
load "stdlibcore.ring"
print("Hello World")
Using stdlibcore.ring You can access the stdlib functions but not the stdlib classes.
if you want to use stdlib.ring and distribute your application
ring2exe hello.ring -dist -allruntime -noqt -noallegro
Not Case-Sensitive
Since the Ring language is not case-sensitive, the same program can be written in different styles
Tip
It’s better to select one style and use it in all of the program source code
LOAD "stdlib.ring"
PRINT("Hello World")
Load "stdlib.ring"
Print("Hello World")
Multi-Line literals
Using Ring we can write multi-line literal, see the next example
Load "stdlib.ring"
Print("
Hello
Welcome to the Ring programming language
How are you?
")
Also you can use the \n to insert new line and you can use #{variable_name} to insert variables values.
Load "stdlib.ring"
Print( "Hello\nWelcome to the Ring programming language\nHow are you?")
Getting Input
You can get the input from the user using the getstring() function
Load "stdlib.ring"
Print("What is your name? ")
cName = GetString()
Print("Hello #{cName}")
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.
Load "stdlib.ring"
Print("What is your name? ") cName=getstring() print("Hello #{cName}")
Writing Comments
We can write one line comments and multi-line comments
The comment starts with # or //
Multi-lines comments are written between /* and */
/*
Program Name : My first program using Ring
Date : 2016.09.09
Author : Mahmoud Fayed
*/
Load "stdlib.ring"
Print("What is your name? ") # print message on screen
cName=GetString() # get input from the user
print("Hello #{cName}") # say hello!
// print("Bye!")
Note
Using // to comment a lines of code is just a code style.