Bug #70009 [Opn->Nab]: modulus operator error

Edit report at https://bugs.php.net/bug.php?id=70009&edit=1 ID: 70009 Updated by: requinix@php.net Reported by: s7sunder at gmail dot com Summary: modulus operator error -Status: Open +Status: Not a bug Type: Bug Package: Unknown/Other Function Operating System: LINUX UBUNTU 14.04 PHP Version: 5.6.11RC1 Block user comment: N Private report: N New Comment: Floating point values have a limited precision. Hence a value might not have the same string representation after any processing. That also includes writing a floating point value in your script and directly printing it without any mathematical operations. If you would like to know more about "floats" and what IEEE 754 is, read this: http://www.floating-point-gui.de/ Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2015-07-07 10:21:07] s7sunder at gmail dot com Description: ------------ Why these 2 values are not returning the true var_dump((1.005*1000)%5==0); //boolean false var_dump((1.015*1000)%5==0); //boolean false Remaining values are correct. Test script: --------------- <?php //These 2 are not returning the expected results var_dump((1.005*1000)%5==0); //boolean false var_dump((1.015*1000)%5==0); //boolean false var_dump((1.005*1000)%5==0); //boolean false var_dump((1.010*1000)%5==0); //boolean true var_dump((1.015*1000)%5==0); //boolean false var_dump((1.020*1000)%5==0); //boolean true var_dump((1.025*1000)%5==0); //boolean true var_dump((1.030*1000)%5==0); //boolean true var_dump((1.035*1000)%5==0); //boolean true var_dump((1.035*1000)%5==0); //boolean true var_dump((1.040*1000)%5==0); //boolean true var_dump((1.045*1000)%5==0); //boolean true var_dump((1.050*1000)%5==0); //boolean true var_dump((1.055*1000)%5==0); //boolean true var_dump((1.060*1000)%5==0); //boolean true var_dump((1.065*1000)%5==0); //boolean true var_dump((1.070*1000)%5==0); //boolean true var_dump((1.075*1000)%5==0); //boolean true var_dump((1.080*1000)%5==0); //boolean true var_dump((1.085*1000)%5==0); //boolean true var_dump((1.090*1000)%5==0); //boolean true var_dump((1.095*1000)%5==0); //boolean true var_dump((1.100*1000)%5==0); //boolean true ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70009&edit=1