how do arithmetic operations with floating point no in shell script

sir,
how do arithmetic operations with floating point number shell script program
expr only provide solution for whole numbers
I want to add floating no
moreover even the ulility like "bc" - calculator adds only whole numbers
Is there any utility to operate on floating point no
Help me
thks in adv

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In comp.os.linux.misc karthikeyan <thegreatkarthik@yahoo.co.in> suggested:
> sir,
> how do arithmetic operations with floating point number shell script program
> expr only provide solution for whole numbers
> I want to add floating no
> moreover even the ulility like "bc" - calculator adds only whole numbers

Works for me:

echo "scale=2; 2.51+2.51" | bc
5.02

Good luck

--
Michael Heiming (GPG-Key ID: 0xEDD27B94)
mail: echo zvpunry@urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
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karthikeyan wrote:
> sir,
> how do arithmetic operations with floating point number shell script program
> expr only provide solution for whole numbers
> I want to add floating no
> moreover even the ulility like "bc" - calculator adds only whole numbers
> Is there any utility to operate on floating point no

bc should understand decimal numbers
$ echo "1.2 - 3.4 " | bc
-2.3


> Help me
> thks in adv

You may browse to
http://www.futuredesktop.org/RedHat9-apt-get.html
and search for "Math" on that page.


// moma
http://www.futuredesktop.org :: The most relevant links at the top

sir,
Thks a lot for your valuable help.
Is there any possible option to go for floating point calculation in "expr"
help me
Thks in adv again

moma <moma@example.net> wrote in message news:<apQJc.3735$v04.53421@news2.e.nsc.no>...
> karthikeyan wrote:
> > sir,
> > how do arithmetic operations with floating point number shell script program
> > expr only provide solution for whole numbers
> > I want to add floating no
> > moreover even the ulility like "bc" - calculator adds only whole numbers
> > Is there any utility to operate on floating point no
>
> bc should understand decimal numbers
> $ echo "1.2 - 3.4 " | bc
> -2.3
>
>
> > Help me
> > thks in adv
>
> You may browse to
> http://www.futuredesktop.org/RedHat9-apt-get.html
> and search for "Math" on that page.
>
>
> // moma
> http://www.futuredesktop.org :: The most relevant links at the top

thegreatkarthik@yahoo.co.in (karthikeyan) wrote in message news:<ecaee7af.0407170405.6a3bc843@posting.google. com>...
> sir,
> Thks a lot for your valuable help.
> Is there any possible option to go for floating point calculation in "expr"
> help me
> Thks in adv again

If you want better maths than the shell can handle, consider using perl instead.

In comp.os.linux.misc karthikeyan <thegreatkarthik@yahoo.co.in> wrote:
> how do arithmetic operations with floating point number shell script program
> expr only provide solution for whole numbers
> I want to add floating no
> moreover even the ulility like "bc" - calculator adds only whole numbers
> Is there any utility to operate on floating point no

Hi,
awk will do simple arithmetic with floating point numbers. For example:

robpc2>echo 1.1 2.2 | awk ' { printf "%f\n", $1 + $2 } '
3.300000

Cheers,
Rob Komar

robertharvey@my-deja.com (Robert E A Harvey) writes:
>thegreatkarthik@yahoo.co.in (karthikeyan) wrote in message news:<ecaee7af.0407170405.6a3bc843@posting.google. com>...
>> sir,
>> Thks a lot for your valuable help.
>> Is there any possible option to go for floating point calculation in "expr"
>> help me
>> Thks in adv again
>
>If you want better maths than the shell can handle, consider using perl instead.

ksh93 handles floating point calculations natively using the let or (( ))
expression evaluation functionality.

Available from <http://www.kornshell.com/>

scott

thegreatkarthik@yahoo.co.in (karthikeyan) writes:

> sir,
> how do arithmetic operations with floating point number shell script program
> expr only provide solution for whole numbers
> I want to add floating no
> moreover even the ulility like "bc" - calculator adds only whole
> numbers

You need to use an external program.

bc and dc are fine for really simple stuff.

awk (gawk) is good for medium level file scan - simple stuff on
command line, more complex things by script file. octave is good for
matrix math and can be operated by script files.

Other viable options include perl and clisp.

> Is there any utility to operate on floating point no
> Help me
> thks in adv

--
Johan KULLSTAM <kullstj-nn@comcast.net> sysengr