clear
echo "Enter first file name: "
read f1
if [ -f $f1 ]
then
    echo "Enter new extention: " 
    read e

    cp ${f1} ${f1}.$e

#    i=basename $f1
#    b= $i txt

#    for file in *.txt
#    i=`basename file txt`
#    mv $file $i doc

    echo $f1"."$e" file is created"else
    echo "File not Exist "
fi