UNIX for Dummies Questions & Answers

exec<file
while read line
do
	set $line
	i=1
	while [ $i -le $# ]
	do
		str=$i  #problematic i want the positional  parameter but here it takes integer value.
		p=1
		q=`expr length $str`
		flag=1
		while [ $p -lt $q ]
		do
		if [ `expr substr $str $p 1` != `expr substr $str $q 1` ]
			then
				flag=0
				break
			fi
			p=`expr $p + 1`
			q=`expr $q - 1`

		done
		if [ $flag -eq 1 ]
		then
			echo $str
		fi
		i=`expr $i + 1`
		
	done
done

 while [ $i -le $# ]

 for i in $*

#!/bin/ksh
# Find palindromes
cat filename|while read LINE
do
        REVERSE=`echo "${LINE}"|rev`
        if [ "${LINE}" = "${REVERSE}" ]
        then
                echo "Palidrome: ${LINE}"
        fi
done

str=$i