IsInt

[grzesiek]

Shouldn't this return 1?

Local $v = (24.60 * 1.3) / 1.23
MsgBox(0,"",IsInt($v))

This returns 1.

Local $v = 31.98 / 1.23
MsgBox(0,"",IsInt($v))

[Melba23]

grzesiek,

Does this give you a hint as to why it does not?

Local $v = (24.60 * 1.3) / 1.23
ConsoleWrite($v & @CRLF)
ConsoleWrite(VarGetType($v) & @CRLF)
ConsoleWrite(IsInt($v) & @CRLF)
ConsoleWrite(Hex($v) & @CRLF)
ConsoleWrite(@CRLF)

Local $w = 31.98 / 1.23
ConsoleWrite($w & @CRLF)
ConsoleWrite(VarGetType($w) & @CRLF)
ConsoleWrite(IsInt($w) & @CRLF)
ConsoleWrite(Hex($w) & @CRLF)
ConsoleWrite(@CRLF)

ConsoleWrite(($v = $w) & @CRLF)

M23

Edited February 24, 2016 by Melba23
Wrong button - too soon

[czardas]

Floating point maths is not always 100% accurate - it's just fast. There is a margin of error which is normally very small. Using Int() will force an integer, but you can only do that if you know the result is an integer. I have spent time looking into this and written a library of functions to do simple calculations of this type using fractions:  https://www.autoitscript.com/forum/topic/165558-fraction/

It's more bother to use fractions, but wildly more accurate than floats are ever likely to be, either now or in the future.

Edited February 24, 2016 by czardas

[iamtheky]

you can always asc / 2

Local $v = (24.60 * 1.3) / 1.23
Local $frmt = Asc(Hex($v)) / 2
msgbox(0, '' , $frmt & @LF & VarGetType($frmt) & @LF & IsInt($frmt))

 

[czardas]

21 minutes ago, iamtheky said:

you can always asc / 2

No you can't. It doesn't work. 

[iamtheky]

26 - double - 1   what exactly is not working?

unless your issue was with *always*, and i would concede that there may be edge cases

Edited February 24, 2016 by iamtheky

[czardas]

I didn't say VarGetType isn't working. This gives the wrong answer (or rather it gives the same answer, which can't be right):

Local $v = (24.67 * 1.3) / 1.23
Local $frmt = Asc(Hex($v)) / 2

msgbox(0, '' , $frmt & @LF & VarGetType($frmt) & @LF & IsInt($frmt))

 

Edited February 24, 2016 by czardas

[iamtheky]

cmon!  every answer is 52

I expected a right proper dismantling

Edited February 24, 2016 by iamtheky

[czardas]

You would have got one, if chrome would have allowed me to post it.

[grzesiek]

T

Quote

Thank you for your answers.