Node:Examples of Interpolation (ASCII Hex Values), Next:Characters Requiring Special Consideration, Previous:Examples of Interpolation (ASCII Octal Values), Up:Double-quoted Strings
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.