tenth-line

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Shell

Given a text file&nbsp;<code>file.txt</code>, print&nbsp;just the 10th line of the&nbsp;file.

Example:

Assume that <code>file.txt</code> has the following content:

<pre>
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
</pre>

Your script should output the tenth line, which is:

<pre>
Line 10
</pre>

<div class="spoilers">Note: 
1. If the file contains less than 10 lines, what should you output? 
2. There&#39;s at least three different solutions. Try to explore all possibilities.</div>

Tenth Line

给定一个文本文件&nbsp;<code>file.txt</code>，请只打印这个文件中的第十行。

示例:

假设&nbsp;<code>file.txt</code> 有如下内容：

<pre>Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
</pre>

你的脚本应当显示第十行：

<pre>Line 10
</pre>

说明: 
1. 如果文件少于十行，你应当输出什么？ 
2. 至少有三种不同的解法，请尝试尽可能多的方法来解题。