python - 不可排序类型 int 和 string

Question

当我运行这个程序时，我可以很好地输入名称，但是当我输入高度时，我收到不可排序的类型错误。

floatHeight = 0
floatWeight = 0
strName = ""

strName = input("What is your name? ")



while floatHeight <= 1 or floatHeight >= 3:
    floatHeight = input("What is your height in metres? ")
while floatWeight <= 10 or floatWeight >= 400:
    floatWeight = input("What os your weight in kilograms? ")
print(floatWeight)
print(floatHeight)

Answer 1

您需要将输入的值转换为float:

while floatHeight <= 1 or floatHeight >= 3:
    floatHeight = float(input("What is your height in metres? "))
while floatWeight <= 10 or floatWeight >= 400:
    floatWeight = float(input("What os your weight in kilograms? "))

否则 floatHeight 或 floatWeight 将是一个字符串。幸运的是，在 Python 3 中，你不能再比较字符串和 float 了。