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hypot

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Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <math.h>
</td>

<td></td> <td></td> <tr class="t-dcl ">

<td >
float       hypotf( float x, float y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C99) </td> </tr> <tr class="t-dcl ">

<td >
double      hypot( double x, double y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C99) </td> </tr> <tr class="t-dcl ">

<td >
long double hypotl( long double x, long double y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C99) </td> </tr> Template:ddcl list end

Computes the square root of the sum of the squares of x and y, without undue overflow or underflow at intermediate stages of the computation. This is the length of the hypotenuse of a right-angled triangle with sides of length x and y, or the distance of the point (x,y) from the origin (0,0), or the magnitude of a complex number x+iy

Contents

Parameters

x - floating point value
y - floating point value

Return value

The hypotenuse of a right-angled triangle, x2
+y2
.

Exceptions

If the result overflows, a range error may occur and FE_OVERFLOW may be raised.

If the result is subnormal, an underflow error may occur and FE_UNDERFLOW may be raised.

Notes

Typical implementation strategy is to calculate an equivalent of u1+(
v
u
)2
where u is max(x,y) and v is min(x,y).

Example

See also

Template:c/numeric/math/dcl list sqrtTemplate:c/numeric/math/dcl list pow