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37 lines
940 B
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37 lines
940 B
HTML
<p>Given an integer <code>n</code>, return <em><code>true</code> if it is a power of two. Otherwise, return <code>false</code></em>.</p>
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<p>An integer <code>n</code> is a power of two, if there exists an integer <code>x</code> such that <code>n == 2<sup>x</sup></code>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> n = 1
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<strong>Output:</strong> true
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<strong>Explanation: </strong>2<sup>0</sup> = 1
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> n = 16
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<strong>Output:</strong> true
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<strong>Explanation: </strong>2<sup>4</sup> = 16
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> n = 3
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<strong>Output:</strong> false
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>-2<sup>31</sup> <= n <= 2<sup>31</sup> - 1</code></li>
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</ul>
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<p> </p>
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<strong>Follow up:</strong> Could you solve it without loops/recursion? |