Shell script to reverse a string.

SOURCE CODE:

echo “Enter the string”

read str

l=`expr length $str`

a=1

r=$l

while [ $a –le $r ]

do

     s=`expr $str | cut –c $l`

     l=`expr $l – 1`

     a=`expr $a + 1`

done

echo $s

OUTPUT:

Enter the string:

HELLO

OLLEH