If I'm reading a number from a file, how can I prevent a 'parse error invalid numeric literal'?

When reading numbers from files, ensure the file format is consistent and contains only valid numeric data. Use error handling (try-catch blocks or similar) to gracefully handle potential parsing errors. Also, consider trimming whitespace from the read string before attempting to convert it to a number. Validate the input string before parsing to ensure it conforms to the expected numeric format.