Electronic cigarette

FIG. 1 is a front elevation view of an electronic cigarette, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left-side elevation view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines depict portions of the electronic cigarette that form no part of the claimed design.