number fail help..i get 5.56e+031

[Mat]

  On 6/16/2010 at 3:21 PM, 'MvGulik said:

Yep. Like using floats type variables with 2^x while they where taking about Integer type variable.

Wow... never knew that.

9187343239835812094 then. (wait... I keep getting different values)

Edit: 921886843722740633 ????

Edit: dividing does as well.

Edited June 16, 2010 by Mat

[wipped]

ehm i cant really follow the thread anymore

[Mat]

Kk, last post then I'm done. Dividing also changes the variable to a double.

$ni = 61
$n = Int(2 ^ $ni)
$i = Int(2 ^ 62)

While 1
    While Not StringInStr($i + $n, "e") And $i + $n > 0
        $i += $n
        ToolTip($i)
    WEnd
    If $n <= 1 Then ExitLoop
    $ni -= 1
    $n = Int(2 ^ $ni)
WEnd

ToolTip("")
ClipPut($i) ; 9223372036854775807

[Melba23]

Mat,

I got those limits from the Help file

<AutoIt - Frequently Asked Questions (FAQ)>

FAQ 15. What are the current technical limits of AutoIt v3?.

Number range (floating point): 1.7E–308 to 1.7E+308 with 15-digit precision

Number range (integers): 64-bit signed integer

Hexadecimal numbers: 32-bit signed integer (0x80000000 to 0x7FFFFFFF)

I just read the bottom line.

M23

[jchd]

@Melba: did you get it?

[Melba23]

jchd,

Get what?

I just trust what our beloved Devs put in the Help file. If what I quoted from there is wrong, could one of you please put a bug report in Trac, because like wipped - I am not really following. Big numbers always made my head hurt - I much prefer exponentials and limited decimal places.

I always thought this summed up the need for accuracy in the real world:

Measure it with a micrometer (engineer)

Mark it with a pencil (mechanic)

Cut it with an axe (workman)

M23

[jchd]

No, not at all what I meant!

0x4772616E74656421 = Binary("Granted!")

[Mat]

  On 6/16/2010 at 5:03 PM, 'Melba23 said:

Mat,

I got those limits from the Help file

<AutoIt - Frequently Asked Questions (FAQ)>

FAQ 15. What are the current technical limits of AutoIt v3?.

Number range (floating point): 1.7E–308 to 1.7E+308 with 15-digit precision

Number range (integers): 64-bit signed integer

Hexadecimal numbers: 32-bit signed integer (0x80000000 to 0x7FFFFFFF)

I just read the bottom line.

M23

I know... and its accurate, the problem is that using certain functions on a number in AutoIt causes it to be cast into a different format, and hence the limit changes. MvGulik pointed out that's what I was doing wrong when I was using the ^ operator, but it also happens when you divide. Both are because it is likely that the result is a decimal, although in the context of what I was doing they wouldn't be.

The one part of that faq that needs to be changed is the line length limit as that is now removed (Or at least part removed...)

Mat

[Melba23]

jchd,

Sorry, I am being slow tonight - 2 rounds of golf today (2 under and 3 under!) on a nice course under a perfect blue sky makes M23 a tired boy!

M23

[MvGulik]

whatever Edited February 7, 2011 by MvGulik

[jchd]

@Melba: you're making too many holes a day...

@Collatz: at least, use compression to halve the number of odd values.

[Mat]

  On 6/17/2010 at 1:55 AM, 'MvGulik said:

wipped. In case you did not get around to it.

expandcollapse popup

#include "BigNum.au3"

Func main()
    
    Local $sSequance = collatz(15)
    MsgBox(0,'MsgBox','$sSequance = ' & $sSequance & @CRLF)
    
    $sSequance = collatz(27)
    MsgBox(0,'MsgBox','$sSequance = ' & $sSequance & @CRLF)
    
EndFunc

Func collatz($iNumber)

    If Not IsInt($iNumber) Then Return SetError(1, 0, 0) ;; eliminate anything not being a integer number.
    If VarGetType($iNumber) = 'double' Then Return SetError(2, 0, 0) ;; eliminate double type. (integer float)

    Local Const $sDelimiter = '|'

    Local $sN = String($iNumber) ;; make string, for use with BigNum UDF. (might not be needed, just taking the save road.)
    Local $sSequence = $sN ;; easy and fast sequence collection.

    While $sN <> '1'
        If Number(_BigNum_Mod($sN, '2')) Then
            $sN = _BigNum_Mul($sN, '3')
            $sN = _BigNum_Add($sN, '1')
        Else
            $sN = _BigNum_Div($sN, '2')
        EndIf
        $sSequence &= $sDelimiter & $sN
    WEnd

    Return $sSequence
EndFunc

main()
Exit

Thats fast. try: collatz(154564565465454656421)