Open file: Using the fopen function allows you to open a file and returns a file pointer pointing to that file.
Create file: If the specified file does not exist, the fopen function will create a new file.
Reading and writing files: Files opened with the fopen function can be used to both read and write, allowing for the ability to read the contents of a file or write data to it.
Close file: The fclose function can be used to close an already opened file, freeing up file resources.
Check if the file has been successfully opened by examining whether the return value of the fopen function is NULL.
