#!/bin/sh str=tanu echo “string:$str” echo “lengh of string:” z=`expr “$str”:’.*’` echo $z echo “substring is” z=`expr “$str”:’.*\(…\)’` echo $z echo “position of character n is” z=`expr “$str”:’[^n]*n’` echo $z
******************* output: $sh a.sh String:tanu Length of string:4 Substring is anu Position of character n is 3 ********************