数的类型

1.自然数--Natural Numbers

2.整数--Integers Numbers

3.有理数--Rational Numbers

Any number that equals the quotient of one integer divided by another non-zero integer, is a rational number, and represented by the set Q

4.无理数--Irrational Numbers

An irrational number cannot be expressed as the quotient of two integers

5.实数--Real Numbers

Rational and irrational numbers comprise the set of real numbers R

6.代数数与超越数--Algebraic and Transcendental Numbers

Numbers that are not roots to polynomial equations are transcendental numbers

7.虚数--Imaginary Numbers

8.复数--Complex Numbers

9.无穷--infinity

The term infinity is used to describe the size of unbounded systems. For example,there is no end to prime numbers: i.e. they are infinite; so, too, are the sets of other numbers.