natural number
Positive whole quantity
A natural number is a positive integer used for counting: 1, 2, 3, and so on.
Mathematicians disagree about whether zero qualifies as a natural number; some definitions include it, others exclude it.
The term distinguishes these basic counting numbers from fractions, negative numbers, and irrational numbers.
Every natural number has a successor.
Number lacking fractions
- positive integerWhole number greater than zero
- zeroNumerical absence of quantity
- oneLowest positive integer
- twoNumber after one
three · successor · predecessor · prime · composite · infinity · cardinality · ordinality
integer
Number lacking fractions
- positive integerWhole number greater than zero
- zeroNumerical absence of quantity
- oneLowest positive integer
two · three · successor · predecessor · prime · composite · infinity · cardinality · ordinality · arithmetic
natural numbercomplex number
Quantity with imaginary component
imaginary number · irrational number · real number · quaternion · decimal number
number, natural, numbers, unnatural, supernatural, numbered, numbering, numeral, naturalness