Welcome aboard our Kotlin programming adventure! Today, we're delving into functions. In the coding universe, a function serves as a mini-program performing a particular task. It helps to partition more extensive programs into organized, reusable components. Envision functions as home robots, each responsible for a specific task.

To write a Kotlin function, we define its name and task using this syntax:

Here, the keyword fun declares a function. Let's define a function named greet that extends a friendly message to the world:

This function, named greet, prints "Hello, World!" to the console when invoked.

To execute its task, we "call" or "invoke" a function using its name followed by parentheses. Functions are often summoned within the special main function. The main function acts as the concertmaster of our program, steering when and which parts (functions) of our code perform.

Here's an example of main calling :