Explain the process of reading from and writing to files in Perl.

In Perl, reading from and writing to files involves a series of steps that enable you to interact with external files and perform operations such as reading data from files or writing data to files. Let's explore the process in detail: 1. Opening a File: * To begin reading from or writing to a file, you need to open it using the `open()` function. * The `open()` function takes three arguments: the filehandle, the file mode, and the file name. * The file mode specifies the intended operation: `<` for reading, `>` for writing, and `>>` for appending. * Example: ``` perl`open(my $filehandle, '<', 'filename.txt') or die "Cannot open file: $!";` ``` 2. Reading from a File: * Once the file is open for reading, you can use various techniques to read its contents. * The most common approach is to use a loop in conjunction with the `readline()` function (also known as....