> Even fewer would understand what decimal numbers are or why they exist. Heck, even I (40+ yo, software professional for ~16 years) only recently realised the

> Even fewer would understand what decimal numbers are or why they exist. Heck, even I (40+ yo, software professional for ~16 years) only recently realised the importance of the decimal "dot" notation and its relation to the positional number system while I was teaching my son. And then the importance of "zero" dawned on me. All these years I never appreciated what was all the fuss about the number zero.