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Perl Tutorial Book

2.1.3.4 Examples of Interpolation (ASCII Hex Values)

You need not use only the octal values when interpolating ASCII characters into double-quoted strings. You can also use the hexadecimal values. Here is our same program using the hexadecimal values this time instead of the octal values:

#!/usr/bin/perl

use strict;
use warnings;

print "A backslash: \x5C\n";
print "Tab follows:\x09over here\n";
print "Ring! \x07\n";
print "Please pay bkuhn\x40ebb.org \x2420.\n";

As you can see, the theme of "there's more than one way to do it" is really playing out here. However, we only used the ASCII codes as a didactic exercise. Usually, you should use the single character sequences (like `\a' and `\t'), unless, of course, you are including an ASCII character that does not have a shortcut, single character sequence.

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