简单讲解Python中的数字类型及基本的数学计算_Python

简单讲解Python中的数字类型及基本的数学计算

2020-08-16 12:00lixiang0522 Python

这篇文章主要介绍了Python中的数字类型及基本的数学计算,与其他语言一样,除法相对复杂些,不过本文并未就此深入,需要的朋友可以参考下

Python有四种类型的数字：
1.整型

				?

									a = 2

									print a

2.长整型

				?

									b = 123456789

									print b

3.浮点数

				?

									c = 3.2E2

									print c

4.复数复数为实数的推广，它使任一多项式都有根。复数当中有个“虚数单位”j，它是-1的一个平方根。任一复数都可表达为x+yj，其中x及y皆为实数，分别称为复数之“实部”和“虚部”。

				?

									d = (2+3j) 

									print d

计算示例：
每种程序语言都有数学计算方法，数学符号通用，大家都知道。直接上代码吧：

				?

									print "I will now count my chickens:"

									print "Hens", 25 + 30 / 6

									print "Roosters", 100 - 25 * 3 % 4

									print "Now I will count the eggs:"

									print 3 + 2 + 1 - 5 + 4 % 2 - 1 / 4 + 6

									print "Is it true that 3 + 2 < 5 - 7?"

									print 3 + 2 < 5 - 7

									print "What is 3 + 2?", 3 + 2

									print "What is 5 - 7?", 5 - 7

									print "Oh, that's why it's False."

									print "How about some more."

									print "Is it greater?", 5 > -2

									print "Is it greatet or equal?", 5 >= -2

									print "is it less or equal?", 5 <= -2

运行结果应该是这样的：

				?

									root@he-desktop:~/mystuff# python ex3.py 

									I will now count my chickens:

									Hens 30

									Roosters 97

									Now I will count the eggs:

									7

									Is it true that 3 + 2 < 5 - 7?

									False

									What is 3 + 2? 5

									What is 5 - 7? -2

									Oh, that's why it's False.

									How about some more.

									Is it greater? True

									Is it greatet or equal? True

									is it less or equal? False

eg：用数学计算把英寸和磅转化为厘米和千克。
1英寸 = 2.54厘米，1磅 = 0.4536千克

				?

									my_height_centimeter = my_height * 2.54

									my_weight_kilo = my_weight * 0.4536

									print "He's %d centimeters tall." % my_height_centimeter 

									print "He's %d kilos heavy." % my_weight_kilo