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# Perl multiplication

Posted on 1999-01-04
Medium Priority
733 Views
Hi,
I'm working now with new shopping cart script.
As you know probably we have new EURO currency
since January 1st in Europe.
This currency has fixed & definitive rate to all other
european currencies.

My total amount in French Francs in my shopping cart is
displayed with this variable:

print "\$ITEM{'price'}"

And fixed parity of FRF to new EURO is  0.152449

I tried to get the equivalency of total amount in EURO
this way :

print "(\$ITEM{'price'} ** 0.152449)"

but the script doesn't make a multiplication at all and displays
simply "item price in FRF taken from database" ** 0.152449  on the screen.

Then I tried to create variable \$euro in shop.cfg
which was stipulated:

\$euro = \$ITEM{'price'}*0.152449

and then in the script:  print"\$euro"

but this solution prints "0" (zero) on the screen instead
total in euros.

I know that this is really Perl school problem but maybe you
can avoid me to search in all Perl books;I didn't find really
simple solution in Perl tutorial included with Perl.

Happy New Year for all.

0
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LVL 84

Expert Comment

ID: 1207309
Perl Question
Title: "Perl multiplication"

Date: Monday, January 04 1999 - 03:32PM PST
Points: 50 Points (Easy)

Hi,
I'm working now with new shopping cart script.
As you know probably we have new EURO currency
since January 1st in Europe.
This currency has fixed & definitive rate to all other
european currencies.

My total amount in French Francs in my shopping cart is
displayed with this variable:
What is in \$ITEM{price}? if it is the string 'price in FRF' that will be treated as 0 when used as a number
0

Author Comment

ID: 1207310
Edited text of question
0

Author Comment

ID: 1207311
Edited text of question
0

Author Comment

ID: 1207312
\$ITEM{price} is the price in FRF taken from flat text database so it's different
for each item but always in FRF
0

LVL 84

Expert Comment

ID: 1207313
the string "item price in FRF taken from database" does not look like a number to Perl
if you want \$ITEM{'price'}*0.152449 to be other than 0, y0u must place a number in \$ITEM{'price'}
(by the way ** is exponentiation, not multiplication)
0

Author Comment

ID: 1207314
when I wrote "item price in FRF taken from database" it was just to say that
the multiplication is not done by the script and full display on the screen is:
price of item taken from database,then signs ** and 0.152449,so nothing
is done.
I have one fixed value which is euro rate and another value is french francs
price taken from database which is different for each item.
I would like simply get the prices in euros displayed on the screen near FRF price
for each item,always with the same exchange rate which will never change more.
0

LVL 84

Expert Comment

ID: 1207315
print "(\$ITEM{'price'} ** 0.152449) = ",\$ITEM{'price'} * 0.152449;

\$euro = \$ITEM{'price'}*0.152449; print \$euro; #should work too
0

LVL 1

Accepted Solution

Cov earned 150 total points
ID: 1207316
\$euro = "23";
\$item{'test'} = \$euro * 0.152449;
print \$item{'test'};

works fine... check out the fact your are doing multiplication, not exponentiation.

0

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