Which values are included in the set of natural numbers (N\mathbb{N}N)?
Positive whole numbers and zero (0,1,2,3,…0, 1, 2, 3, \dots0,1,2,3,…).
Positive and negative whole numbers and zero (…,−2,−1,0,1,2,…\dots, -2, -1, 0, 1, 2, \dots…,−2,−1,0,1,2,…).
Positive whole numbers only (1,2,3,4,…1, 2, 3, 4, \dots1,2,3,4,…).
Positive whole numbers and positive fractions (1,32,2,52,…1, \frac{3}{2}, 2, \frac{5}{2}, \dots1,23,2,25,…).
