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<pre>
DataFrame <code>employees</code>
+-------------+--------+
| Column Name | Type. |
+-------------+--------+
| name | object |
| salary | int. |
+-------------+--------+
</pre>
<p>A&nbsp;company plans to provide its employees with a bonus.</p>
<p>Write a solution to create a new column name <code>bonus</code> that contains the <strong>doubled values</strong> of the <code>salary</code> column.</p>
<p>The result format is in the following example.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre>
<strong>Input:</strong>
DataFrame employees
+---------+--------+
| name | salary |
+---------+--------+
| Piper | 4548 |
| Grace | 28150 |
| Georgia | 1103 |
| Willow | 6593 |
| Finn | 74576 |
| Thomas | 24433 |
+---------+--------+
<strong>Output:</strong>
+---------+--------+--------+
| name | salary | bonus |
+---------+--------+--------+
| Piper | 4548 | 9096 |
| Grace | 28150 | 56300 |
| Georgia | 1103 | 2206 |
| Willow | 593 | 13186 |
| Finn | 74576 | 149152 |
| Thomas | 24433 | 48866 |
+---------+--------+--------+
<strong>Explanation:</strong>
A new column bonus is created by doubling the value in the column salary.</pre>