Handling multiple files in programming requires careful consideration of error management, particularly when some files may not exist. The presented example illustrates how to implement robust error handling in a word counter program, modeled after the `wc` (word count) command. The approach not only logs errors when files are missing but also ensures that the counts for existing files are displayed, thereby improving user experience. Key techniques include modifying functions to return errors alongside their primary values, checking for errors using consistent syntax, and utilizing the `continue` keyword in loops to skip non-existent files without halting the entire process. By adopting these best practices, the program achieves a user-friendly output while correctly signaling errors through status codes.