The electric potentiol is constabt through a given region of space. is the electric field zero, or non zero in this region explain?

The electric field intensity is described by the relation: E = - ΔV/Δr

according to the relation, the electric field is negative gradient of electrical potential. the electrical potential is constant throughout a given region. the change in electric potential is in electric potential ΔV = 0, hence E = 0