擅长:python、mysql、java
<p>您的<code>for</code>循环代码的等效<code>while</code>循环版本是:</p>
<pre><code>>>> i = 0
>>> while i < len(names):
j = 0
to_print = ""
while j < len(names[i]):
to_print += names[i][j] + " "
j += 1
print(to_print)
i += 1
Bilbo Baggins
Gollum
Tom Bombadil
Aragorn
</code></pre>
<p>更好的<code>for</code>循环代码是:</p>
<pre><code>>>> for person in names:
print(' '.join(person))
Bilbo Baggins
Gollum
Tom Bombadil
Aragorn
</code></pre>