Numbers with dots in variables in an expression

[ppan]

I would like to use numbers with dots in an expression. Much to my surprise AHK actually does what I need it to do:

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if (12.34 < 23.45)

really works. However, the next step is to do this test with user input. So I'm using variables:

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Gui, Add, Edit, x200 y20 w250 h20 foo, 
Gui, Add, Edit, x200 y40 w250 h20 bar, 

if (%foo% < %bar%) 

I get an error that the variable contains an illegal character. I have tried "%foo%" and (%foo%) but both don't work. Does anyone have an idea?

[Helgef]

Hello and welcome. Please see expressions and operators in expressions, specifically %var%. Also see if (expression) and compare to if (traditional).
Try,

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if (foo < bar)

Good luck, cheers.

[ppan]

Oh seriously...I've been looking for half an hour but the answer has been there all that time! Thanks!