python基础教程（自编精品）

4.4.IFELIFELSE??|?é

......

elif:

statements_nelse:

statements_else

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ifx>=90:

print\Best!\elifx>=80:

print\Excellent!\elifx>=70:

print\Good!\elifx>=60:

print\Just?Pass\else:

print\NoPass!\

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5.1while?:?{

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while:

statementselse:

statements

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i=0

whilei<=10:

i=i+1

print\hellojeapedu.com\

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??§?Li<=10ù?^???ò?±?<”hellojeapedu.com”ù?i?G10g??\

???SμX?|1～100?úo

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i=1s=0

whilei<=100:

s=s+ii=i+1

print\=%d\%(s)

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15ùwhileì?N

5.2whileN??ò?

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importrandom

r=random.randint(1,100)i=0

whilei<100:

g=input(\guess\ifg==r:

breakelifg>r:

print’plzsmaller!than%d’%(g)else:

print’plzbigger!than%d’%(g)print\Bingo!\

5.3continue?é

whileì?N?éNp?ycontinue‰1?§??gì?continue?e???é???‰

1§????\\e?gì?\

g???S

1??|?ê§??O¤?ê§?N^ù??ê\

m?oc.??udêe?eapj.www2?????N????|?ê\

3??????

6??|^rawinput?\\12!34!56?|ú(int?ê?òi?G=???/êa)

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6.1i?G?:

^úòú?5??i?8ü???i?G§ùp??úò?±′?éüúò!Vúò!núò(ü!V)\üúòúVúòi?G???v??O§A???′^núòú?5??i?G??oT?~f5`2?eμ'X????Hello-Jack....ù?i?GTX?^print?

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s=\hello’jack’...\prints

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hello’jack’...

???Hello”Jack”...U???rsp??üúòU¤Vúòoo

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s=\hello\jack\\prints

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(1)3jacki?G??jc>úk??>\\t\\òò1,·???ù?L??a?=?i?§?XC?óp??\\nú\\tt′=?i?\Python?)?Vúòp????i?§X‘\\?ò\\úù??>??i?|ü¤=?i???n)??(?aU?i??Y?n)\

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m?oc.??udêe?eapj.wwws=\hello\\\jack\\\\

prints

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hello\jack\

(2)^núòú?5??i?GPython′?'%i?Gp??Vúòúüúò??§???

??”’hello”jack”...”’\

33