判断结构

tang=100
if tang>200:
    print(‘OK‘)
print(‘test‘)##有缩进就不在就不在if条件结构中

test

 tang=100
if tang >200:
        print(‘200‘)
elif tang<100:
        print(‘100‘)
else:
    print(‘100-200‘)

100-200

tang=50
if tang>200:
    print(‘200‘)
elif tang<100:
    print(‘100‘)
else:
    print(‘100-200‘)

100

tang=[123,456,789]
if 123 in tang:
    print(‘OK‘)

OK

tang={‘tang‘:123,‘yudi‘:456}
if ‘tang‘in tang:
    print(‘ok‘)

ok