# hypot

(PHP 4 >= 4.1.0, PHP 5)

hypot Calculate the length of the hypotenuse of a right-angle triangle

### Description

float hypot ( float `\$x` , float `\$y` )

hypot() returns the length of the hypotenuse of a right-angle triangle with sides of length `x` and `y`, or the distance of the point (`x`, `y`) from the origin. This is equivalent to sqrt(x*x + y*y).

### Parameters

`x`

Length of first side

`y`

Length of second side

### Return Values

Calculated length of the hypotenuse

``` A simpler approach would be to allow an arbitrary number of parameters. That would allow for whatever number of dimensions you want *and* it would be backwards compatible with the current implementation. <?php function hypo() {     \$sum = 0;     foreach (func_get_args() as \$dimension) {         if (!is_numeric(\$dimension)) return -1;         \$sum += pow(\$dimension, 2);     }     return sqrt(\$sum); } print hypo();          // vector in 0 dimensions, magnitude = 0. print hypo(1);         // vector in 1 dimension,  magnitude = 1. print hypo(3, 4);       // vector in 2 dimensions, magnitude = 5. print hypo(2, 3, 6);     // vector in 3 dimensions, magnitude = 7. ?> ```