The capital Latin letter Q is used in mathematics to represent the set of natural numbers. Usually, the letter is presented with a “double-struck” typeface when it is used to represent the set of rational numbers.
The set of natural numbers, also called the counting numbers, contains the numbers 0, 1, 2, 3, ...
The Latin Alphabet is a collection of 26 symbols that form the basis of the English language. The alphabet's symbols are used throughout mathematics to represent variables, constants, and coeffecients.
The latin letter q.