----- 016-math.php -----
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<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>数学函数测试</title>
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<body>
<h3>数学函数测试</h3>
<pre>
<?php
echo "-2.7的绝对值：", abs(-2.7), "\n";
echo "2.4取FLOOR：", floor(2.4), "\n";
echo "2.4取ROUND：", round(2.4), "\n";
echo "2.4取CEIL：", ceil(2.4), "\n";
echo "1023换二进制：", decbin(1023), "\n";
echo "1和0.9哪个大：", max(1, 0.9), "\n";
echo "2的30次方：", pow(2, 30), "\n";
echo "1到2随机数10次：\n";
for($i=0; $i<10; $i++)
echo rand(1, 2), "\t\n";
echo "取2的开方：", sqrt(2), "\n";
?>
</pre>
</body>
</html>
