擅长:python、mysql、java
<p>测试一个单词是否存在,如果不存在,就跳出<code>while</code>循环。你知道吗</p>
<pre><code>wordlist = []
msg = "Please enter a hilariously long word: "
# I said "hilariously long" to increase the likelihood of a repeat letter
while True:
word = input(msg)
if word:
if word[0].lower() in word[1:].lower():
wordlist.append(word)
else:
break
print("All of the words that had repeated first letters are: ")
print(wordlist)
</code></pre>
<p>还要注意<code>wordlist</code>是<code>list</code>,所以测试<code>while wordlist != ""</code>总是这样,因为<code>list</code>不是<code>string</code></p>