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Using file handles

Using file handles - Perl Tutorial

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Using file handles

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- [Voiceover] A file handle is a special variable that's used to access a file or other stream. Here's a working copy of filehandle.pl from Chapter 12 of the Exercise Files, and you'll notice here on line seven, I declare a scalar variable with the text lines.txt in it, and that is a file, and we can open the file here, and I'll just double click on it, and you can see that it's a file with 10 lines of text in it that are numbered. So, I'll go ahead and close that. Down here, around line nine, I open the file using the Open function, and the Open function takes several arguments. The first one is called a file handle, and we'll talk about that a little more as we go on. The second one is the file mode for opening it, and the left-angle bracket it means to opening it for read. I would a right-angle bracket if I wanted to write, and we'll cover more of those in a minute, and then the file name. I use or, and the function die, which we'll talk about later, which displays an error message…

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