What Scripting Language Does Secondlife Use?


Heather Bennett

In the virtual world of Second Life, a scripting language called Linden Scripting Language (LSL) is used. LSL is specifically designed to create interactive objects and behaviors within the Second Life platform, allowing users to customize and bring their virtual creations to life.

What is Linden Scripting Language (LSL)?

LSL is a high-level programming language developed by Linden Lab, the creators of Second Life. It is similar in syntax to C and Java, making it relatively easy for developers familiar with those languages to pick up LSL.

With LSL, users can create a wide range of interactive objects, including furniture, vehicles, games, and even entire virtual environments. These objects can respond to user input, communicate with other objects or avatars, and perform various actions based on predefined scripts.

Key Features of LSL

  • Simplicity: LSL’s syntax is designed to be beginner-friendly and easy to understand. Its straightforward structure allows users with little or no programming experience to start creating interactive content in Second Life.
  • Event-driven: LSL scripts respond to events triggered by user actions or changes in the virtual environment.

    This event-driven approach enables dynamic interactions between objects and avatars.

  • Library Functions: LSL provides a comprehensive set of built-in functions that simplify common tasks such as object manipulation, avatar communication, math calculations, and more. These functions help developers save time by leveraging pre-existing functionalities.

Creating Interactive Objects with LSL

To create an interactive object in Second Life using LSL, you need to attach a script to it. The script contains instructions that define how the object should behave and respond to user interactions.

Let’s take an example of a simple interactive door:

integer isOpen = FALSE;

        llSetObjectName("Interactive Door");
    touch_start(integer total_number)
        if (isOpen)
            isOpen = FALSE;
            isOpen = TRUE;
        // Code to open the door goes here
        // Code to close the door goes here

In this script, we define a default state that sets the initial properties of the object when it is rezzed in-world. The state_entry() function sets the object’s name and defines that it should respond to clicks by opening or closing the door.

The touch_start() function is triggered when an avatar touches the object. It checks whether the door is already open or closed and performs the corresponding action accordingly. The llOpenDoor() and llCloseDoor() functions can be customized with actual code to animate or move the door.


Linden Scripting Language (LSL) is an essential tool for creating interactive content in Second Life. Its simplicity, event-driven nature, and library functions make it accessible for both beginners and experienced developers. With LSL, users can unleash their creativity and bring their virtual creations to life within the immersive world of Second Life.

So why wait? Start exploring LSL today and create your own interactive experiences in Second Life!

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