Number Sets in Latex

Include the package amsfonts or amssymb
$\usepackage{amsfont}$ or $\usepackage{amssymb}$

•     Prime Numbers $\mathbb{P}$ ($\mathbb{P}$): No positive divisors other than 1 and itself: 1, 3, 5, 7, 11, ...
•     Natural Numbers $\mathbb{N}$ ($\mathbb{N}$): 0, 1, 2, 3
•     Integers $\mathbb{Z}$ ($\mathbb{Z}$): ..., -3, -2, -1, 0, 1, 2, 3
•     Irrational Numbers $\mathbb{I}$ ($\mathbb{I}$): $\pi$, 1.3333...
•     Rational Numbers $\mathbb{Q}$ ($\mathbb{Q}$): any real number can be expressed by ration of two integers, such as 0.5 (1/2), 1.6 (8/5)
•     Real Numbers $\mathbb{R}$ ($\mathbb{R}$):
•     Complex Numbers $\mathbb{C}$ ($\mathbb{C}$)