Explain a real-world scenario where you would use a variadic function in Go.

In a real-world scenario, a variadic function in Go is often used when dealing with command-line tools, especially when parsing user input. Command-line arguments can vary in number, and using a variadic function allows you to handle this flexibility. For example, when building a command-line tool, you might need to accept a variable number of file paths as arguments. A variadic function can simplify the code by allowing you to work with an arbitrary number of arguments. This can make your program more user-friendly and adaptable.