Autoit adds 0.09999999997 instead of 0.01

[anonymous]

After adding 0.01 to $c few times, $c will be incremented by 0.999999 instead of 0.01

$c = 0
$inc = 0.01

Do
 $c += $inc
Until $c > 14
ConsoleWrite('$c = ' & $c & @crlf)

Output:

+>14:50:40 AU3Check ended.rc:0
>Running:(3.2.12.1):C:\Program Files\AutoIt3\autoit3.exe "C:\Documents and Settings\shithole\Desktop\bug.au3"    
$c = 14.0099999999997
+>14:50:41 AutoIT3.exe ended.rc:0

Windows XP SP3
AutoIt V3.2.12.1

Best regards

[rbhkamal]

I'm rbhkamal... not anonymous

[Valik]

This is not a bug. Floating-point numbers are not precise so repeatedly adding a floating point number leads to these sorts of problems. You can find plenty of literature on the internet about it.