# Natural number starts with 1 or zero? [duplicate]

• That depends on the used convention. Some prefer $0\in\mathbb{N}$, others prefer $0\notin \mathbb{N}$. – Daniel Fischer Feb 15 '15 at 12:46
• It is like calling a table a table, it's just a matter of convention. You could call a horse a table, it would be another convention. Except that then, you could maybe have issues with a vast majority of people not adhering to this convention. It is really sad to see what intellectual struggle has been made to accept $0$ as an element of $\mathbf{N}$ to still see the debate on wheter $0\in\mathbf{N}$ or not. – ujsgeyrr1f0d0d0r0h1h0j0j_juj Feb 15 '15 at 12:53