Files are helpful in many scenarios. For example, if you need to process an enormous amount of data, manually supplying one input at a time makes the program execution slow. Alternatively, you can store the input data in a file and allow your program to read the data from it. This approach is undoubtedly faster than the previous approach. You can also save data by writing to a file. In this context, the use of logs is quite common in real-world scenarios.