Re: [PHP] floored by floor()
On 10/14/2010 07:48 AM, Mattias Thorslund wrote: Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias Read the floating point precision part http://nl2.php.net/float Use round() before you use floor() to get the expected result. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
在 2010-10-13三的 22:48 -0700，Mattias Thorslund写道： Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias i think u should read the manual about int and float: http://www.php.net/manual/en/language.types.integer.php http://www.php.net/manual/en/language.types.float.php#warn.float-precision jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
On 10/13/2010 11:56 PM, gaojian wrote: 在 2010-10-13三的 22:48 -0700，Mattias Thorslund写道： Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias i think u should read the manual about int and float: http://www.php.net/manual/en/language.types.integer.php http://www.php.net/manual/en/language.types.float.php#warn.float-precision jim Thanks, I guess I needed to read that again. What confused me here was that var_dump(327.03 * 100) returns the expected value and not something like (float)32702.99... Cheers, Mattias -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
On 10/13/2010 10:48 PM, Mattias Thorslund wrote: Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias Wouldn't that be equivalent to floor(32703), and since 32703 is the nearest integer to 32703 it returns it? Glen Fuller -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
floor(32703) is different then floor(327.03 * 100). The former is an int, while the later is a float. Read those links that were sent :) Chris. On Thu, Oct 14, 2010 at 2:14 AM, Glen Fuller glenmful...@shaw.ca wrote: On 10/13/2010 10:48 PM, Mattias Thorslund wrote: Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias Wouldn't that be equivalent to floor(32703), and since 32703 is the nearest integer to 32703 it returns it? Glen Fuller -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
On 10/13/2010 11:14 PM, Glen Fuller wrote: On 10/13/2010 10:48 PM, Mattias Thorslund wrote: Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias Wouldn't that be equivalent to floor(32703), and since 32703 is the nearest integer to 32703 it returns it? Glen Fuller Nope, this is floating-point math fuzziness. Try it: echo floor(32703).\n; echo floor(327.03 * 100).\n; Cheers, Mattias -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
On 10/14/2010 09:22 AM, Mattias Thorslund wrote: Thanks, I guess I needed to read that again. What confused me here was that var_dump(327.03 * 100) returns the expected value and not something like (float)32702.99... Cheers, Mattias echo serialize(327.03 * 100); -- Thanks! -Shawn http://www.spidean.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] floored by floor()
On 10/14/2010 7:49 AM, chris h wrote: floor(32703) is different then floor(327.03 * 100). The former is an int, while the later is a float. Read those links that were sent :) Chris. On Thu, Oct 14, 2010 at 2:14 AM, Glen Fullerglenmful...@shaw.ca wrote: On 10/13/2010 10:48 PM, Mattias Thorslund wrote: Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias Wouldn't that be equivalent to floor(32703), and since 32703 is the nearest integer to 32703 it returns it? Glen Fuller -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php I, see - makes sense now, thank you! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] floored by floor()
Hi List, I'm having a problem with the behavior of the floor() function: echo floor(327.03 * 100).\n; //prints 32702 and not 32703!! Sanity check: var_dump(327.03 * 100); //prints float(32703) as expected Any ideas why this happens, and how to work around it? Thanks, Mattias -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
