继续loop

记录一下进行多层判断时的不同写法。

e = 20
f = 8
if e < f:
    print("e is less than f")
elif e == f:
    print("e is equal to f")
elif e > f + 10:
    print("e is greater than f by 10")
else:
    print("e is greater than f")

g = 8
h = 8
if g < h:
    print("g is less than h")
else:
    if g == h:
        print("g is equal to h")
    else:
        print("g is greater than f")

需要体会python中通过缩进体现逻辑和结构的形式
学习一下写函数：

name1 = "xiaoshuang"
height_m1 = 2
weight_kg1 = 90

def  BMI_calculator(name, hight_m, weight_kg):
    BMI = height_m1 / (weight_kg**2)
    print("BMI:")
    print(BMI)
    if BMI > 25:
        return (name) +  " is over weight"
    else:
        return (name) +  " is not over weight"

result1 = BMI_calculator(name1, height_m1, weight_kg1)
print(result1)

BMI:
0.0002469135802469136
xiaoshuang is not over weight

注意：只有return是返回给result的结果，所以需要print显示，其他的是运行function的结果。
另外，今天学到的是需要耐心的对待报错，静下心去看报错的类型和原因，而不是看到报错就慌乱。
python is fun, let's keep trying~