What is function overloading?

Function overloading refers to the ability to define multiple functions with the same name within the same scope, where each function is differentiated by the number or types of parameters it accepts. This allows for more intuitive and streamlined code, as developers can use the same function name to perform similar operations that might only differ in the type or number of inputs.

For example, you might have a function named "add" that can take two integer parameters, another version that takes two double parameters, and yet another that can handle a single integer parameter to add a default value. This flexibility makes the code more readable and easier to maintain because the function's purpose remains clear through its name while catering to different types of inputs.

The other options do not accurately reflect the concept of function overloading. Defining functions with unique names does not cater to the idea of overloading, which relies on the same name. Creating functions that cannot be reused contradicts the essence of programming best practices, where reusable code is generally favored. Lastly, transforming one function into another does not encapsulate the idea of function overloading, which is specifically about having functions with the same name but different parameter signatures.