tall = 1.75 weight = 80.5 BMI = weight / (tall * tall)

if BMI < 18.5: print('过轻') elif 18.5 < BMI < 25: print('正常') elif 25 < BMI < 28: print('过重') elif 28 < BMI < 32: print('肥胖') elif BMI > 32: print('严重肥胖')

运行结果：

========================== RESTART: D:/练习.py ========================== 过重