How does Huckle rule help to decide the aromatic character of a compound ?

Explanation

A compound may be aromatic, if it obeys Huckel rule
`(i)` The molecule must be co-planar
`(ii)` Complete delocalization of `pi` electron in the ring
`(iii)` Presence of `(4n+2)pi` electrons in the ring where `n` is an integer `(n=0,1,2…….....)`
Eg:
`(i)` The benzene is a planar molecule
`(ii)` It has six deloclaised `pi` electrons
`(iii) 4n+2=6`
`4n=6-2`
`4n=4`
`n=1`
it obeys Huckel's `(4n+2)pi` electron rule
with `n=1` hence , benzene is aromatic.