Python实例9： BMI指数计算_python计算bmi

方法一 

name = str(input("请输入你的姓名："))
height = eval(input("请输入你的身高（m）:"))
weight = eval(input("请输入你的体重（kg）:"))
 
BMI = weight / pow(height, 2)
print("BMI值为：{:.2f}".format(BMI))    # {:.2f} 调用方法保留小数点后两位
if BMI < 18.5:
    print("偏瘦")
else:
    if 18.5 < BMI < 25:
        print("正常")
    else:
        if 25 < BMI < 28:
            print("偏胖")
        else:
            if 28 < BMI < 32:
                print("肥胖")
            else:
                if BMI > 32:
                    print("严重肥胖！")

方法二

name = str(input("请输入你的姓名："))
height = eval(input("请输入你的身高（m）:"))
weight = eval(input("请输入你的体重（kg）:"))
 
BMI = weight / pow(height, 2)
print("BMI值为：{:.2f}".format(BMI))
if BMI < 18.5:
    print("偏瘦")
elif 18.5 < BMI < 25:
    print("正常")
elif 25 < BMI < 28:
    print("偏胖")
elif 28 < BMI < 32:
    print("肥胖")
else:
    print("严重肥胖！")

方法三

# BMI指数计算
height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
bmi = weight / pow(height, 2)
print("BMI 数值为：{:.2f}".format(bmi))
who, nat = "", ""
if bmi < 18.5:
    who, nat = "偏瘦", "偏瘦"
elif 18.5 <= bmi < 24:
    who, nat = "正常", "正常"
elif 24 <= bmi < 25:
    who, nat = "正常", "偏胖"
elif 25 <= bmi < 28:
    who, nat = "偏胖", "偏胖"
elif 28 <= bmi < 30:
    who, nat = "偏胖", "肥胖"
else:
    who, nat = "肥胖", "肥胖"
print("BMI 指标为:国际'{0}', 国内'{1}'".format(who, nat))