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Home: Perl Programming Help: Beginner:
Creating 0's after decimals



May 22, 2001, 12:45 AM

Post #1 of 15 (3799 views)
Creating 0's after decimals Can't Post

Okay. I have this:

and then
print "\$$total";

if $count is at say 50 or 500
it returns $1.5 or $15.
How do i get this to print $1.50 or $15.00?


Enthusiast / Moderator

May 22, 2001, 2:03 AM

Post #2 of 15 (3798 views)
Re: Creating 0's after decimals [In reply to] Can't Post

Use the printf function. If you're familiar with C programming, it has (nearly) the same syntax. Try

printf "\$%.2f", $total;

-- Marcus


May 22, 2001, 11:52 AM

Post #3 of 15 (3784 views)
Re: Creating 0's after decimals [In reply to] Can't Post

Hey thanks again Marcus!
I had a little trouble working it into my script because I had lines like this
print "<tr><td width=50%><B>Total Payout = <font color=FF0000><B>$total </B></font></td></tr>";
print "</table>";

I couldnt replace $total in <B></B> with that printf line,and I couldnt seem to give the printf command a seperate value like:
$total2 = (printf "\$%.2f" ,$total;);
So I just broke the table into seperate lines:
print "<tr>";
print "<td width=50%>";
print "<B>Total Clicks = </B>";
print "<font color=FF0000><B>$count</B></font>";
print "</td>";
print "<td width=50%>";
print "<B>";
print "Total Payout = ";
print "<font color=FF0000><B>";
printf "\$%.2f" ,$total;
print "</B></font></td></tr>";
print "</table>";

What are some other ways I could have dealt with this problem if I wanted to limit the amount of lines in the script?

Thanks again Marcus :-)


May 22, 2001, 12:08 PM

Post #4 of 15 (3782 views)
Re: Creating 0's after decimals [In reply to] Can't Post

simple, use the



$total = $count * .03; 
$total = sprintf("\$%.2f",$total);

print qq(<tr><td width="50%"><B>Total Payout = <font color="#FF0000"><B>$total</B></font></td></tr>

Fueled By ZCom


May 22, 2001, 3:26 PM

Post #5 of 15 (3772 views)
Re: Creating 0's after decimals [In reply to] Can't Post

Thank You zanardi!
Exactly what I was looking for!

Do you happen to know of any good sites with perl tutorials I could visit to improve my scripting skills?
Seems Like they are all either too basic or too advanced for me. At least the ones I have checked out so far. I use to really like but last time I checked,their perl tutorials were gone.

Anyways,thank you all for your help! Its much appreciated!


May 22, 2001, 3:36 PM

Post #6 of 15 (3769 views)
Re: Creating 0's after decimals [In reply to] Can't Post


im not sure, but i "think" that there are some perl tutorials at try looking there.. personally i taught myself perl, and the book i used was "perl for Dummies" and i will tell you, it was the best investment i ever made.. i picked it up so fast.. the explanations in that book are so easy my 5 yr old could almost read and understand it.

i hope this helps..



May 22, 2001, 3:52 PM

Post #7 of 15 (3767 views)
Re: Creating 0's after decimals [In reply to] Can't Post

Oh other thing if you dont mind!
I have seen the print qq statement many times,but dont quite understand its function. Can you explain to a newbie like myself exactly what print qq is telling perl?

Thanks, xcom


May 22, 2001, 3:58 PM

Post #8 of 15 (3766 views)
Re: Creating 0's after decimals [In reply to] Can't Post

Thanks randor!
I will pick that book up tomorrow!
Sound like they made the book just for me! (Perl For Dummies)!

Man.....I love scripting but sure wish I had a better grasp of perl! I could write 4 scripts in the time it takes me to write 1!

Ever wish you could jump from the bottom rung on the ladder straight to the top???!!!! LOL

Thanks guys!.....Much appreciated.



May 22, 2001, 5:14 PM

Post #9 of 15 (3761 views)
Re: Creating 0's after decimals [In reply to] Can't Post


no problem on the help with the book, it is why i come here.. to help as i was helped when i started.. and yes, i wished the same thing when i was learning.. and infact i still learn everyday....

print qq

the qq basically means "quote word", how this works is:

print qq~ hello xcom, i am writing to you\n~;

is the EXACT same as:

print " hello xcom, i am writing to you\n";

the difference is that with print qq~

we can
just keep
on many
to keep
using the
print ""
each line.
plus with the qq it will allow you to add variables.. like so:
joe has a $object...\n~;

the trick with qq is that whatever the next character is after the first qq is what perl will look for to end the quote.. so:

print qq~ (which is what alot of people use to quote with) will print everything until it finds another ~ and dont forget the ;

now, if you did this:
print qq| it would print everything until it finds another |

i hope this helps..


May 22, 2001, 9:44 PM

Post #10 of 15 (3753 views)
Re: Creating 0's after decimals [In reply to] Can't Post

That just helped me with an important part of my script!
I had to write into my script some code that would create a new cgi file every time someone signed up and that little bit of info just helped me put that all together!


May 23, 2001, 5:39 AM

Post #11 of 15 (3745 views)
How to search... [In reply to] Can't Post

Hello XCom,

I know there's not so much help in saying RTFM (Read The [censored] Manual) but i think that peoples should really have a look the documentation. I'm quite sure your version of perl come with the perldoc program.

If you try perldoc --help at your favourite shell, or cmd.exe, you'll get really usefull informations. A good start is:perldoc perl.

Now there is some good options to know about, for example, to search the perl's FAQs, you can use the -q. Where, a funny example, in perldoc -q decimal you would find this:
To get rid of the superfluous digits, just use a format (eg, "printf("%.2f", 19.95)") to get the required precision. See the Floating-point Arithmetic entry in the perlop manpage.

Another one is to check what does a perl's function, like in (another fortuituous example Smile) perldoc -f qq which gives:
Generalized quotes. See the Regexp Quote-Like Operators entry in the perlop manpage.

Now you saw three references to the perlop man page (if you checked perldoc perl), and I'm sure you will come, by yourself to where you need to look to really understand how qq// works.

Another way to search the perl's documentation is with the -r switch, but again you should know it since you tried perldoc --help earlier Smile.

Also have a look on how to search the displayed informations by perldoc (in general you type /some regex with the slash to get the prompt).

I mean no offense with this message, but i just wanted to explain to people in general, how i find answers to the general questions I ask myself about perl. It's far more faster to know how to find by yourself than to wait for peoples in a forum to reply.

Btw, for your last question, if you dont find what you need with perldoc, try perldoc perlbook Smile.

For a good tutorial for perl look there. Or learn how to search and you'll be able to find the incredible treasures hidden deep in the net...

I hope this really helps,
else dont hesitate to ask other questions here.

Real programmers don't eat cache.


May 23, 2001, 12:56 PM

Post #12 of 15 (3741 views)
Books [In reply to] Can't Post

And about books, go to and look for perl books by O'Reilly. Search and see which one you would like the best. I hear all of them are exellent. also has great prices

Fueled By ZCom


May 23, 2001, 2:57 PM

Post #13 of 15 (3739 views)
Re: Books [In reply to] Can't Post

i have not shopped at bookpool, but my experience has been with and it has books (used) for about half (go figure) the regular price..

just another option.

hope this helps...


May 23, 2001, 3:05 PM

Post #14 of 15 (3737 views)
Re: Books [In reply to] Can't Post

Hi Zanardy,

you didnt checked my last link, did you? Smile


Real programmers don't eat cache.


May 24, 2001, 11:47 AM

Post #15 of 15 (3729 views)
Re: Books [In reply to] Can't Post

um yeah I did..

bookpool has new books, for less than what you would normally find them too

and they have a bunch of perl books. Just got look

Fueled By ZCom


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