Welcome! Today's Kotlin lesson demystifies two key features: named arguments and default parameter values. They make function calls clearer and the code more maintainable.

Named arguments enhance code readability by associating each argument with a parameter name, thereby eliminating the need to remember their order.

Imagine you're drawing a rectangle:

This function can be called using named parameters, providing better clarity when reading the code:

Named arguments make function invocations self-explanatory, reducing errors and improving readability.

Default parameter values assign a default value to a function parameter. They permit the skipping of parameters that aren't required for the function call.

Consider a function that greets a user:

You can call this function in three ways:

The first function call uses the default value, as no argument is passed.

The combination of both concepts brings flexibility and clarity.

Let's modify the drawRectangle function, adding a default color:

You can then call this function as follows:

Excellent work! We've expanded our function toolkit by learning about named arguments and default parameter values. These features simplify function calls, thereby improving your Kotlin expertise.

Now, it's time for hands-on practice tasks to solidify your understanding. The combination of learning with practice is key to mastery in coding. So, let's start coding!