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mitsos

08-30-2006 09:41 PM

floating-point in script

hi
i'm writting a script that contains the following variable
size2=$(($size1 + $size2))
but when it tries to add numbers like 6.1
all i get is syntax error in expression (error token is ".1")

i tried bc
size2=$(($size1 + $size2)) | bc
and i get the same

any hints?

kaz2100

08-30-2006 09:49 PM

Which language?? or shell script??

Happy Penguins!!

mitsos

08-30-2006 09:53 PM

Quote:

Originally Posted by kaz2100

Which language?? or shell script??

Happy Penguins!!

shell script

ilikejam

08-30-2006 10:15 PM

Hi.

Your bc command should look like:

Code:

size2=`echo "$size1 + $size2" | bc`

Dave

mitsos

08-30-2006 10:28 PM

thanx dave for your reply
but i already tried that and it produces the same error!!!

KenJackson

08-31-2006 06:00 AM

Code:

#!/bin/sh

size1=3.5 size2=2.6

size2=$(echo $size1 + $size2 | bc)

echo $size2

It prints 6.1 for me.

mitsos

08-31-2006 07:14 AM

thanx but i just rewrite it all in korn and worked.

Code:

#!/bin/ksh

size2=$((size1 + size2))

So, if you're going to do math, better use ksh. :)

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