Cutting hair at 0 degrees of elevation (no lift) typically creates:

Cutting hair at 0 degrees of elevation — keeping the hair down with no lift away from the head — creates a blunt, one-length or solid form, where all the hair falls to a single perimeter line. As elevation increases, the cut develops graduation (stacking) and then layering. The classic blunt bob is an example of a 0-degree cut. Connecting elevation to the resulting shape (0 degrees = one length, higher = graduation/layers) is a fundamental haircutting concept frequently tested on the exam.