php - why does this happen?

[cj-design]

$rrp = "19.99";
$price = "14.99";
$saving = $rrp - $price;
$adding = $rrp + $price;

print "RRP: $rrp";
print "<p>";
print "Price: $price";
print "<P>";
print "Saving $saving";
print "<P>";
print "Added Together $adding"; 

Output:

RRP: 19.99
Price: 14.99

Saving 5

Added Together 34.98


What happened to the decimal places on the saving?

[cezam]

it's 5.00, so print strips the decimal places off.

printf is your friend, check manual.

[jovigirl]

i dont wanna buy zoom glasses

[Brujah]

it doesn't keep the format, you can use sprintf to do it.. instead of print.

$saving = sprintf( "%01.2f", $rrp - $price );

http://www.php.net/sprintf

[rowan]

Be careful using decimal places for pricing, you can get some strange effects with floats... probably better to calculate everything in cents internally (as a whole number), and then divide it by 100 to display it.

[cj-design]

cheers boys.

[Thorin]

Originally posted by cj-design
What happened to the decimal places on the saving?

...

PHP/MySQL Programmer

Wow...

[Freestyleman]

Originally posted by Thorin



Wow...

[JamesK]

Originally posted by jovigirl
i dont wanna buy zoom glasses

HAHAHAHAAHAHHA