Python有四種類型的數(shù)字：
1.整型
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a = 2print a |
2.長(zhǎng)整型
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b = 123456789print b |
3.浮點(diǎn)數(shù)
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c = 3.2E2print c |
4.復(fù)數(shù) 復(fù)數(shù)為實(shí)數(shù)的推廣，它使任一多項(xiàng)式都有根。復(fù)數(shù)當(dāng)中有個(gè)“虛數(shù)單位”j，它是-1的一個(gè)平方根。任一復(fù)數(shù)都可表達(dá)為x+yj，其中x及y皆為實(shí)數(shù)，分別稱為復(fù)數(shù)之“實(shí)部”和“虛部”。
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d = (2+3j) print d |
計(jì)算示例：
每種程序語(yǔ)言都有數(shù)學(xué)計(jì)算方法，數(shù)學(xué)符號(hào)通用，大家都知道。直接上代碼吧：
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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 |
運(yùn)行結(jié)果應(yīng)該是這樣的：
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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：用數(shù)學(xué)計(jì)算把英寸和磅轉(zhuǎn)化為厘米和千克。
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 |
