ABSTRACT
M1.1. Real Numbers M1.1.1. Integer Numbers ◮ Natural, integer, even, and odd numbers. Natural numbers: 1, 2, 3, . . . (all positive whole numbers).
Integer numbers (or simply integers): 0, ±1, ±2, ±3, . . . Even numbers: 0, 2, 4, . . . (all nonnegative integers that can be divided evenly by 2).
