You do simple programming constructs using ksh like this:
$ cat sample.sh
#!/bin/ksh
echo -n "Please enter a number:"
read n
echo "You entered $n"
echo "Do you want to square it? Y/N"
read res
if [ $res = "Y" ]; then
square=`expr $n \* $n`
echo "Square of $n is $square"
else
echo "Bye"
fi
You can move on to really feature rich scripts.
Basic looping is provided by the pleasant for() construct which is
very different from the C for.
It is also found in perl.
Let us see a sample.
$ looping
for f in `ls /etc/*`
do
echo "$f"
type=`file $f`
echo "$f is of type $t"
done
Please note that I use backticks '`" which is the same key as ~.
~ is called as tilde and ` is known as backquote or backtick.
You use the latter for evaluating shell expressions.
t='date'
t="date"
are both useless. ;)
t=`date`
is useful...
-Girish
--
Gayatri Hitech
http://gayatri-hitech.com
