Python有四种类型的数字：
1.整型
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a = 2print a |
2.长整型
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b = 123456789print b |
3.浮点数
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c = 3.2E2print 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”。
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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：
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print "I will now count my chickens:" print "Hens", 25 + 30 / 6print "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 + 2print "What is 5 - 7?", 5 - 7 print "Oh, that's why it's False." print "How about some more." print "Is it greater?", 5 > -2print "Is it greatet or equal?", 5 >= -2print "is it less or equal?", 5 <= -2 |
运行结果应该是这样的：
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root@he-desktop:~/mystuff# python ex3.py I will now count my chickens:Hens 30Roosters 97Now I will count the eggs:7Is it true that 3 + 2 < 5 - 7?FalseWhat is 3 + 2? 5What is 5 - 7? -2Oh, that's why it's False.How about some more.Is it greater? TrueIs it greatet or equal? Trueis 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
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my_height_centimeter = my_height * 2.54my_weight_kilo = my_weight * 0.4536print "He's %d centimeters tall." % my_height_centimeter print "He's %d kilos heavy." % my_weight_kilo |
