python if elif else 语句

Question

这个问题在这里已经有了答案:

How can I read inputs as numbers? (10 个回答)

How are strings compared? (7 个回答)

关闭 上个月。

我正在尝试使用 python 创建一个计算运输成本的程序。

但是，我无法将程序运行到正常运行的位置。

我的总金额相同，美国为 6 美元，加拿大为 8 美元。我似乎无法通过。

total = raw_input('What is the total amount for your online shopping?')
country = raw_input('Shipping within the US or Canada?')

if country == "US":
    if total <= "50":
        print "Shipping Costs $6.00"
    elif total <= "100":
            print "Shipping Costs $9.00"
    elif total <= "150":
            print "Shipping Costs $12.00"
    else:
        print "FREE"

if country == "Canada":
    if total <= "50":
        print "Shipping Costs $8.00"
    elif total <= "100":
        print "Shipping Costs $12.00"
    elif total <= "150":
        print "Shipping Costs $15.00"
    else:
        print "FREE"

Answer 1

1. 你应该从 raw_input 获取整数，而不是字符串。使用 int().
2. 50、100、150 等比较值也应该是 integer。

以下是固定代码。

total = int(raw_input('What is the total amount for your online shopping?'))
country = raw_input('Shipping within the US or Canada?')

if country == "US":
    if total <= 50:
        print "Shipping Costs $6.00"
    elif total <= 100:
        print "Shipping Costs $9.00"   # improved indentation
    elif total <= 150:
        print "Shipping Costs $12.00"  # improved indentation
    else:
        print "FREE"

if country == "Canada":
    if total <= 50:
        print "Shipping Costs $8.00"
    elif total <= 100:
        print "Shipping Costs $12.00"
    elif total <= 150:
        print "Shipping Costs $15.00"
    else:
        print "FREE"