(C) 2003, Tim Maher       1-32       www.TeachMePerl.com
Number Crunching
pcalc
 #! /bin/sh
 # Script patches in given args for "$*",
 # creating custom Perl program

 perl -wl -e "print $*;"


Examples
$ pcalc 'sqrt(22/7)'
Becomes:  perl -wl -e "print sqrt(22/7);"
 1.77281052085584
$ pcalc 'sqrt(sqrt(2)**7)+cos(.5)'
 4.24116822290523
$


SUMMARY


grep, sed, & awk
very useful commands
but with ancient limitations,
especially in commercial UNIX
(the GNU utilities fix some)