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| <h3 class="section">8.154 <code>LOG10</code> — Base 10 logarithm function</h3> |
| |
| <p><a name="index-LOG10-824"></a><a name="index-ALOG10-825"></a><a name="index-DLOG10-826"></a><a name="index-exponential-function_002c-inverse-827"></a><a name="index-logarithm-function-with-base-10-828"></a><a name="index-base-10-logarithm-function-829"></a> |
| <dl> |
| <dt><em>Description</em>:<dd><code>LOG10(X)</code> computes the base 10 logarithm of <var>X</var>. |
| |
| <br><dt><em>Standard</em>:<dd>Fortran 77 and later |
| |
| <br><dt><em>Class</em>:<dd>Elemental function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = LOG10(X)</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>X</var> </td><td valign="top" width="70%">The type shall be <code>REAL</code>. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>The return value is of type <code>REAL</code> or <code>COMPLEX</code>. |
| The kind type parameter is the same as <var>X</var>. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> program test_log10 |
| real(8) :: x = 10.0_8 |
| x = log10(x) |
| end program test_log10 |
| </pre> |
| <br><dt><em>Specific names</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="20%">Name </td><td valign="top" width="20%">Argument </td><td valign="top" width="20%">Return type </td><td valign="top" width="25%">Standard |
| <br></td></tr><tr align="left"><td valign="top" width="20%"><code>ALOG10(X)</code> </td><td valign="top" width="20%"><code>REAL(4) X</code> </td><td valign="top" width="20%"><code>REAL(4)</code> </td><td valign="top" width="25%">Fortran 95 and later |
| <br></td></tr><tr align="left"><td valign="top" width="20%"><code>DLOG10(X)</code> </td><td valign="top" width="20%"><code>REAL(8) X</code> </td><td valign="top" width="20%"><code>REAL(8)</code> </td><td valign="top" width="25%">Fortran 95 and later |
| <br></td></tr></table> |
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