Perl: Releasing Your Inner Textuality - More Printing Information (Page 4 of 4 )
Another thing to keep in mind is that you must use a backslash to print a $ symbol. Without it, Perl will try to interpret it as a variable. Behold:
#!/usr/bin/perl
print "I have $15.00 in my pocket boyee!";
If you try to run that program you will get an odd result:
I have .00 in my pocket boyee!
Very odd indeed. Since we aren't trying to print a variable, the proper way to write this code would be:
#!/usr/bin/perl
print "I have \$15.00 in my pocket boyee!";
Which would give us the correct print out of:
I have $15.00 in my pocket boyee!
Similarly, you cannot print out an @ symbol either. The following will not work:
#!/usr/bin/perl
print "My email address is james@james.com.";
If you used this code it would print:
My email address is james.com.
To fix this, we again use our good old buddy the backslash:
#!/usr/bin/perl
print "My email address is james\@james.com.";
Which prints out:
My email address is james@james.com .
And lastly, we can also use escape characters and special characters on our variables. Here is an example:
#!/usr/bin/perl
$color="black";
$number="eight";
print "\n\nPlease find my favorite color and number below:\n\n";
print "\tMy favorite color:\t\t\t$color\n";
print "\tMy favorite number is:\t\t\t$number\n\n";
This will print out our text and variables so that they appear like this on the user's screen:
Please find my favorite color and number below"
My favorite color: black
My favorite number is: eight
Well that's all the time we have for this exciting episode. Join us next time when we continue this intriguing, gut wrenching discussion on Perl text manipulation. I look forward to seeing you.
Till then...
| DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware. |