[back] [prev] [next] [index] [root]

<p>&nbsp;<p>
<hr noshade size="5">
<h2><a name="Ei"></a>
Ei
</h2>

This function computes an approximation of the integral
from -\infty to x of exp(t)/t.

<p><p>

<h3>
Syntax:
</h3>
<pre>a := Ei(b);</pre>

<p>

<table>
<tr>
<td>real</td>
<td><pre>  a  </pre></td>
<td></td>
</tr>
<tr>
<td>real</td>
<td><pre>  b  </pre></td>
<td></td>
</tr>
</table>

<p>


<h3>
Description:
</h3>
\int_{-\infty}^x frac{exp(t)}{t}dt

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>

<pre>

kash> Ei(1.0);
> 1.895117816355936755466520934331634269017060581732

</pre>

<p>


<hr>

<p>
<a href="../kashref.html"><- back</a>[back] [prev] [next] [index] [root]