base-7

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Algorithms

Given an integer <code>num</code>, return a string of its base 7 representation.

&nbsp;
Example 1:
<pre>Input: num = 100
Output: "202"
</pre>Example 2:
<pre>Input: num = -7
Output: "-10"
</pre>
&nbsp;
Constraints:

<ul>
	<li><code>-107 &lt;= num &lt;= 107</code></li>
</ul>

convertToBase7

Base 7

Math

给定一个整数 <code>num</code>，将其转化为 7 进制，并以字符串形式输出。

&nbsp;

示例 1:

<pre>
输入: num = 100
输出: "202"
</pre>

示例 2:

<pre>
输入: num = -7
输出: "-10"
</pre>

&nbsp;

提示：

<ul>
	<li><code>-107&nbsp;&lt;= num &lt;= 107</code></li>
</ul>