浅谈Python基础―判断和循环

test=100if test>50: print('OK')print('test')

test=50if test>200: print('200')elif test<100: print('100')else: print('100-200')

test1=[123,456,789]if 123 in test1: print('OK')

test2={'hello':123,'world':456}if 'hello' in test2: print('OK')

test=0while test<10: print(test) test+=1

test1=set(['hello','world'])while test1: test2=test1.pop() print(test2)

test3=set(['hello','world'])for t in test3:#相当于foreach print(t)

test4=[123,456,789]for i in range(3): print(test4[i])

test5=[123,456,789,34,5435,26,2362,262,26,5]for i in range(len(test5)): print(test5[i])

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)

test7=[12,13,14,15,16,17,18,19,20]for i in test7: if i%2==0:  print(i)  else:  break print(i)