PHP

Exponents

You want to raise a number to a power.

Use the following functions:

exp(): to raie e to a power.
pow(): to raise to any power

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
<head>
<title>Exponents</title>
<meta Name="Author" Content="Hann So">
</head>
<body>
<p>
<?php
$num = 2;
echo "exp($num): ", exp($num), "<br />"; // raise e to a power
echo "pow(2, 10): ", pow(2, 10), "<br />"; // raise to any power
echo "pow(2, -2): ", pow(2, -2), "<br />";
echo "pow(-2, -2.5): ", pow(-2, -2.5), "<br />"; // NAN (error: Not a Number)
?>
</p>
</body>
</html>

View the effect