hypot() calculates the hypotenuse length from the two perpendicular sides of a right triangle.
$a = 3;
$b = 4;
echo hypot($a, $b); // 5
hypot() also gives the distance from the point ($x, $y) to the origin and handles negative side values by magnitude.
<?Php
echo hypot(4,3); // Output is 5
echo "<br>";
echo hypot(2,3); // Output 3.605551275464
echo "<br>";
echo hypot(4,5); // Output 6.4031242374328
echo "<br>";
echo hypot(8,10); // Output is 12.806248474866
echo "<br>";
echo hypot(12,13); // Output is 17.691806012954
?>
Syntax
float hypot(float $x, float $y)
| Parameter | DESCRIPTION |
|---|---|
| $x | Required : Length of first side. |
| $x | Required : Length of second side. |
sqrt($x * $x + $y * $y).
echo round(hypot(9,10),2); // Output is 13.45
$a = 3;
$b = 4;
echo hypot($a, $b); // Output: 5 (Pythagorean theorem: sqrt(3^2 + 4^2))
$a = -3;
$b = 4;
echo hypot($a, $b); // Output: 5 (Negative values are squared, so the result is positive)
These examples show that hypot() works with positive or negative coordinate values because the result represents a distance.
Author & Instructor at plus2net
I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.