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# [SOLVED] - Rounding values to fixed number of decimals

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Posted (edited)

Hi all guys/girls,

I have an issue calculating a correct rounded value when selling/purchasing crypto values:

This is the issue:

Assets have a fixed max number of decimals that can be used.

So if I have to buy, i.e. 7.00004374 FLUX where FLUX has 4 decimals max, I need to purchase the higher rounded value with max 4 decimals.

```#include <ButtonConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#Region ### START Koda GUI section ### Form=Y:\__ AutoIt\BITBOT\GUI_BitBot\tet2.kxf
\$Form1 = GUICreate("frm1", 199, 151, 485, 272)
\$Input1 = GUICtrlCreateInput("7.00004374", 64, 8, 121, 21)
\$Label1 = GUICtrlCreateLabel("Value", 8, 10, 34, 17)
\$Label2 = GUICtrlCreateLabel("Decimals", 8, 46, 44, 17)
\$Input2 = GUICtrlCreateInput("4", 64, 44, 121, 21)
\$Label3 = GUICtrlCreateLabel("Result", 8, 82, 45, 17)
\$Input3 = GUICtrlCreateInput("", 64, 80, 121, 21)
\$Button1 = GUICtrlCreateButton("Calc", 8, 112, 179, 25)
GUISetState(@SW_SHOW)
#EndRegion ### END Koda GUI section ###

While 1
\$nMsg = GUIGetMsg()
Switch \$nMsg
Case \$GUI_EVENT_CLOSE
Exit
Case \$Button1
GUICtrlSetData(\$Input3,_DoCalc(GUICtrlRead(\$Input1),GUICtrlRead(\$Input2)))
EndSwitch
WEnd

Func _DoCalc(\$value,\$decimals)
\$answer = Round(\$value,\$decimals)
Return \$answer
EndFunc```

Using the classic Round() doesn't solve it

Correct result should be (some examples here below):

• 7.00004374 -> (max 2 decimals) -> 7.01
• 7.00004374 -> (max 3 decimals) -> 7.001
• 7.00004374 -> (max 4 decimals) -> 7.0001
• 7.00004374 -> (max 5 decimals) -> 7.00005
• 7.00004374 -> (max 6 decimals) -> 7.000044
• 7.00004374 -> (max 7 decimals) -> 7.0000438

How can I manage it?

Thanks in advance,

Marco

Edited by marko001
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• Developers

You need an RoundUp function for that. one way of doing that is:

```\$input = 7.00004374
ConsoleWrite(_RoundUp( \$input, 0) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 1) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 2) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 3) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 4) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 5) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 6) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 7) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 8) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 9) & @CRLF)
ConsoleWrite(_RoundUp( \$input, 10) & @CRLF)

Func _RoundUp( \$iValue, \$iDec)
\$oValue = Round(\$iValue,\$iDec)
If \$oValue < \$iValue Then
\$oValue = Round(\$iValue + (0.5 / (10 ^ \$idec)),\$iDec)
EndIf
return \$oValue
EndFunc```

result:

```8
7.1
7.01
7.001
7.0001
7.00005
7.000044
7.0000438
7.00004374
7.00004374
7.00004374```

Jos

SciTE4AutoIt3 Full installer Download page   - Beta files

Live for the present,
Dream of the future,
Learn from the past.

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Wow, perfect! works exaclty as intended!

Thanks a lot!

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• marko001 changed the title to [SOLVED] - Rounding values to fixed number of decimals

Use glyphosate sparingly, it's bad for environment!

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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• 3 weeks later...

The problem was that currency != numbers...

Skysnake

Why is the snake in the sky?

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