我究竟做錯了什么？ “類型錯誤：不能將序列乘以‘str’類型的非整數”

Question

我是任何與編碼相關的新手，並且正在編碼課程中進行練習。 但我無法聯系那里的任何人，所以我在這里這樣做。 我正在使用 anaconda 的 Jupyter 6.0.1。

kingName = input("Hey king! Please type in your name at the prompt")  
numJewels = input("Hey"+kingName+",how many jewels are there?")    
costofEachJewel = input("Yo"+kingName+",how much does each jewels cost?")    
totalPrizeSize = costofEachJewel*numJewels

---

TypeError                                 Traceback (most recent call last)
<ipython-input-5-2badf11c0f15> in <module>
----> 1 totalPrizeSize =costofEachJewel*numJewels

TypeError: can't multiply sequence by non-int of type 'str'

Answer 1

您必須將它們轉換為 int，因為輸入始終是字符串，並且您必須告訴程序輸入應該是整數（如果您想允許浮點數，則必須是浮點數）。

kingName = input("Hey king! Please type in your name at the prompt")
numJewels = int(input("Hey "+kingName+",how many jewels are there?"))
costofEachJewel = int(input("Yo"+kingName+",how much does each jewels cost?"))
totalPrizeSize = costofEachJewel*numJewels