Only the normal floating point numbers have this property, the sub-normals do not.
In the single precision floats for example there is no 0.000000000000000000000000000000000000000000002
it goes straight from 0.000000000000000000000000000000000000000000001
to 0.000000000000000000000000000000000000000000003
Subnormals are a dirty hack to squeeze a bit more breathing space around zero for people who really need it. They aren't even really supported in hardware. Using them in normal contexts is usually an error.
In the single precision floats for example there is no 0.000000000000000000000000000000000000000000002 it goes straight from 0.000000000000000000000000000000000000000000001 to 0.000000000000000000000000000000000000000000003
So that's not even one whole digit of precision.