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| <title>The GNU Fortran Compiler: HYPOT</title> |
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| <a name="HYPOT-_002d_002d_002d-Euclidean-distance-function"></a> |
| <h3 class="section">9.125 <code>HYPOT</code> — Euclidean distance function</h3> |
| <a name="index-HYPOT"></a> |
| <a name="index-Euclidean-distance"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p><code>HYPOT(X,Y)</code> is the Euclidean distance function. It is equal to |
| <em>\sqrt{X^2 + Y^2}</em>, without undue underflow or overflow. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>Fortran 2008 and later |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Elemental function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>RESULT = HYPOT(X, Y)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>X</var></td><td width="70%">The type shall be <code>REAL</code>.</td></tr> |
| <tr><td width="15%"><var>Y</var></td><td width="70%">The type and kind type parameter shall be the same as |
| <var>X</var>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>The return value has the same type and kind type parameter as <var>X</var>. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">program test_hypot |
| real(4) :: x = 1.e0_4, y = 0.5e0_4 |
| x = hypot(x,y) |
| end program test_hypot |
| </pre></div> |
| </dd> |
| </dl> |
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