When lim(x->0) is undefined ?

lim x->0=limx->0 x^0=0^0=undefined

0^0 is not undefined
rather is indeterminate ...
plzz approve 

when RHL and LHL are not equal

limit x tending to 0 is not defined if either of the two happen:

1)

left hand limit and right hand limit are not equal

or

2)left hand limit = right hand limit

but these are not equal to the value at zero.