What are variadic functions and how do they work in different programming languages?

What are variadic functions and how do they work in different programming languages?

Variadic functions are functions that can accept a variable number of arguments. For example, in C, you can use stdarg.h to handle them.

Can you give me an example of a variadic function in Python?

Sure! In Python, you can define a variadic function using *args. For instance:

def my_function(*args): for arg in args: print(arg) This function can take any number of arguments.

How about in JavaScript?

In JavaScript, you can use the rest parameter syntax. For example:

function myFunction(...args) { console.log(args); } This function will log all passed arguments as an array.

Are there any performance considerations with using variadic functions?

Yes, variadic functions can introduce overhead due to argument handling, especially in languages like C. It's important to use them judiciously.