PHP hypot() function

Definition and usage

hypot()The function calculates the length of the hypotenuse of a right triangle. The calculation formula for the hypotenuse is as follows:

h=sqrt(x² y²), where x and y are the other two sides of the right triangle

For example, if x=3, y=4, then hypot(x,y)=5, that is, sqrt(3² 4²) = sqrt(25) =5

This function always returns a floating point number.

Syntax

hypot ( float $x , float $y ) : float

Parameters

Return value

PHP hypot() function returns the length of the hypotenuse of a right triangle given x and y values

PHP Version

This function is available in PHP versions 4.x, PHP 5.x and Available in PHP 7.x.

Example

Online Demonstration

The following example calculates the length of the hypotenuse of a right triangle with side lengths 3 and 4−

<?php
   $x = 3;
   $y = 4;
   echo "hypot(" . $x . "," . $y . ") = " . hypot($x, $y);
?>

Output

This returns largest integer−

hypot(3,4) = 5

Example

Live Demo

Return value of hypot(x,y) function is equal to sqrt(x*x y*y ) as per pythogoras theorem. Following example confirms it−

<?php
   $x = 3;
   $y = 4;
   echo "hypot(" . $x . "," . $y . ") = " . hypot($x, $y) ."</p><p>";
   echo "Hypotenuse calculated by Pythogoras equation = " . sqrt(pow($x,2)+pow($y,2));
?>

output

This will return the following output−

hypot(3,4) = 5
Hypotenuse calculated by Pythogoras equation = 5

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