如何判断一个数是否是2的N次方
- PHP中文网Original
- 2016-05-26 08:19:182090browse
判断一个数是否是2的N次方
#使用 $result = x&(x-1) 来判断；
if(x & (x-1))
{
echo "不是2的n次方"
}
else
{
echo "是2的n次方"
}Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：限制非安全IP访问Next article：php代码在线编辑器