判断
缩进代替大括号。
冒号（:）后换号缩进。
if
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1
2
3
4
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test=100
if test>50:
print('ok')
print('test')
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if-elif-else
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2
3
4
5
6
7
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test=50
if test>200:
print('200')
elif test<100:
print('100')
else:
print('100-200')
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列表
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1
2
3
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test1=[123,456,789]
if 123 in test1:
print('ok')
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字典
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2
3
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test2={'hello':123,'world':456}
if 'hello' in test2:
print('ok')
|
循环
while
数值
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2
3
4
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test=0
while test<10:
print(test)
test+=1
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集合
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2
3
4
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test1=set(['hello','world'])
while test1:
test2=test1.pop()
print(test2)
|
for
集合
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2
3
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test3=set(['hello','world'])
for t in test3:#相当于foreach
print(t)
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列表
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2
3
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test4=[123,456,789]
for i in range(3):
print(test4[i])
|
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2
3
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test5=[123,456,789,34,5435,26,2362,262,26,5]
for i in range(len(test5)):
print(test5[i])
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continue
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2
3
4
5
6
7
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test6=[11,12,13,14,15,16,17,18,19,20]
for i in test6:
if i%2==0:
print(i)
else:
continue
print(i)
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break
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1
2
3
4
5
6
7
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test7=[12,13,14,15,16,17,18,19,20]
for i in test7:
if i%2==0:
print(i)
else:
break
print(i)
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以上所述是小编给大家介绍的python基础—判断和循环详解整合，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：https://www.cnblogs.com/gloria-zhang/p/10572125.html