How to check a file of folder is empty or not linux script...

[root@vikas Desktop]# touch v/v1
[root@vikas Desktop]# touch v/v2
[root@vikas Desktop]# [ -z "$(ls -A /root/Desktop/v)" ] && echo "empty" || echo "not"
not
[root@vikas Desktop]# [ -z "$(cat /root/Desktop/coralPBX.sh)" ] && echo "empty" || echo "not"
not
[root@vikas Desktop]# [ -z "$(cat /root/Desktop/ss)" ] && echo "empty" || echo "not"
empty
[root@vikas Desktop]# rm v/v
v1 v2
[root@vikas Desktop]# rm v/v
v1 v2
[root@vikas Desktop]# rm v/v*
rm: remove regular empty file `v/v1'? y
rm: remove regular empty file `v/v2'? y
[root@vikas Desktop]# [ -z "$(ls -A /root/Desktop/v)" ] && echo "empty" || echo "not"
empty
[root@vikas Desktop]# rmdir v
[root@vikas Desktop]# [ -z "$(ls -A /root/Desktop/v)" ] && echo "empty" || echo "not"
ls: cannot access /root/Desktop/v: No such file or directory
empty
[root@vikas Desktop]#