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Decimal numbers

 
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IRCNick
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Joined: 12 Oct 2005
Posts: 64
Location: Germany
PostPosted: Sun Jul 02, 2006 5:16 am    Post subject: Decimal numbers Reply with quote
Hi, I have a problem with the decimal numbers. How can make my script to show and calculate decimal numbers ? Should I use the package "Decimal arithmetic" or there is other way to do what I need ?

This is a sample of that what I'm trying to do:

Code:

set a 12; set b 20; set sum [expr ($a + $b)]
set c [expr (($a / 100) * ($sum / 100)) * 100]
set d [expr (($b / 100) * ($sum / 100)) * 100]
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Sir_Fz
Revered One


Joined: 27 Apr 2003
Posts: 3793
Location: Lebanon
PostPosted: Sun Jul 02, 2006 6:37 am    Post subject: Reply with quote
Add a decimal point to the number you're dividing by. For example:
Code:
set c [expr (($a / 100.) * ($sum / 100.)) * 100]

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IRCNick
Halfop


Joined: 12 Oct 2005
Posts: 64
Location: Germany
PostPosted: Mon Jul 03, 2006 3:06 pm    Post subject: Reply with quote
Ok it works, but now I have a double value for the result. How can I convert it to integer ?
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Sir_Fz
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Joined: 27 Apr 2003
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PostPosted: Mon Jul 03, 2006 5:27 pm    Post subject: Reply with quote
Code:
set result [expr {int($result)}]

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IRCNick
Halfop


Joined: 12 Oct 2005
Posts: 64
Location: Germany
PostPosted: Mon Jul 03, 2006 6:34 pm    Post subject: Reply with quote
Thank you
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De Kus
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Joined: 15 Dec 2002
Posts: 1361
Location: Germany
PostPosted: Thu Jul 06, 2006 7:07 am    Post subject: Reply with quote
int() will cut off string after the decimal point, round() will do the same, but adding 0.5 before doing so Very Happy.
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Sir_Fz
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Joined: 27 Apr 2003
Posts: 3793
Location: Lebanon
PostPosted: Fri Jul 07, 2006 5:03 am    Post subject: Reply with quote
round() will round to the closest number. For example:
Quote:
% expr round(1.2)
1
% expr round(1.6)
2

floor() will round to the lower and ceil() will round to the greater.
Quote:
% expr floor(1.6)
1.0
% expr ceil(1.6)
2.0

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