What is the largest possible number in AutoIt?

[TheDcoder]

So yeah, what's the largest possible number which can be stored in a variable as an integer?? I don't see it in the helpfile .

[TheDcoder]

So yeah, what's the largest possible number which can be stored in a variable as an integer?? I don't see it in the helpfile .

[jchd]

-2^63 largest négative, 2^63-1 largest positive.

[TheDcoder]

Are you sure that its the same for both 32 bit and 64 bit AutoIt @jchd?

[jchd]

What did you try that led you to suspect otherwise?

[TheDcoder]

I know that it differs in C...

[TheDcoder]

Also, this works for me:

MsgBox(0,0,2^63) ; Note that I added 1 to the maximim possible number.

 

[jchd]

You can perform arithmetic on 64-bit integers in C inside a X86 process.

Now:

$n = 9223372036854775800
For $i = 1 To 12
    ConsoleWrite($n & " is a " & VarGetType($n) & @LF)
    $n +=  1
Next

 

[jchd]

Also:

ConsoleWrite(VarGetType(2^63) & @LF)

 

[TheDcoder]

6 minutes ago, jchd said:

Now:

$n = 9223372036854775800
For $i = 1 To 12
    ConsoleWrite($n & " is a " & VarGetType($n) & @LF)
    $n +=  1
Next

 

My Output:

9223372036854775800 is a Int64
9223372036854775801 is a Int64
9223372036854775802 is a Int64
9223372036854775803 is a Int64
9223372036854775804 is a Int64
9223372036854775805 is a Int64
9223372036854775806 is a Int64
9223372036854775807 is a Int64
-9223372036854775808 is a Int64
-9223372036854775807 is a Int64
-9223372036854775806 is a Int64
-9223372036854775805 is a Int64

 

4 minutes ago, jchd said:

Also:

ConsoleWrite(VarGetType(2^63) & @LF)

 

Double

 

Edited September 15, 2016 by TheDcoder

[water]

$iInt32 = 2147483647 ; 2^31 - 1. Highest Int32
$iInt64 = $iInt32 + 1 ; lowest 64 Int
ConsoleWrite(VarGetType($iInt32) & @CRLF)
ConsoleWrite(VarGetType($iInt64) & @CRLF)
$iInt64 = 9223372036854775807 ; 2^63 - 1. Highest Int64
ConsoleWrite(VarGetType($iInt64) & @CRLF)

as described here: https://www.autoitscript.com/autoit3/docs/intro/lang_datatypes.htm

[jchd]

Obviously!

You really should google about 2's complement arithmetics. Also X64 is (merely) X86 with an address space on steroids (well, from AutoIt simple users point of view).

[water]

$iInt32 = 2147483647 ; 2^31 - 1. Highest Int32
$iInt64 = $iInt32 + 1 ; lowest 64 Int
ConsoleWrite(VarGetType($iInt32) & @CRLF)
ConsoleWrite(VarGetType($iInt64) & @CRLF)
$iInt64 = 9223372036854775807 ; 2^63 - 1. Highest Int64
ConsoleWrite(VarGetType($iInt64) & @CRLF)

 

[jchd]

Finally, note that 2^63 being a double isn't an exceptional case:

ConsoleWrite(VarGetType(2^48) & @LF)
ConsoleWrite(VarGetType(2^49) & @LF)