script to check whether File exists

# shell script to check whether file exist in a directory
# if exists then show last modification time
#!/bin/bash


echo "Enter file name "
read mfile
if [ ! -f $mfile ] ; then

echo "file does not exist"
exit 1
else
    echo "file exists"
    echo "Last modification time : `ls -l $mfile | cut -d " " -f 9` "
fi