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Top Forums Shell Programming and Scripting program for multiplication in shell script Post 302343239 by jpriyank on Wednesday 12th of August 2009 03:40:28 AM
Old 08-12-2009
try this script which i made keeping in mind u are new to shell programming

prod=1
#prod will store final product
i=`awk -F, '{ print NF}' abc`
#count number of digits into variable i
n=1
while [ $n -le $i ]
do
temp=`cut -d, -f$n abc`
#cutting each digit and storing in temp
prod=`expr $prod \* $temp`
n=`expr $n + 1`
done
echo $prod


i hope this helps
 

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PIDOF(8)						Linux System Administrator's Manual						  PIDOF(8)

NAME
pidof -- find the process ID of a running program. SYNOPSIS
pidof [-s] [-x] [-o omitpid] [-o omitpid..] program [program..] DESCRIPTION
Pidof finds the process id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts are located in /etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead. OPTIONS
-s Single shot - this instructs the program to only return one pid. -x Scripts too - this causes the program to also return process id's of shells running the named scripts. -o Tells pidof to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro- gram, in other words the calling shell or shell script. NOTES
pidof is simply a (symbolic) link to the killall5 program, which should also be located in /sbin. When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is possible that it returns pids of running programs that happen to have the same name as the program you're after but are actually other programs. SEE ALSO
shutdown(8), init(8), halt(8), reboot(8) AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl 01 Sep 1998 PIDOF(8)
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