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<TITLE>PI Constant Pi
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<H2>PI Constant Pi
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<P>
Section: <A HREF=sec_constants.html> Base Constants </A>
<H3>Usage</H3>
Returns a <code>double</code> (64-bit floating point number) value that represents pi (ratio between the circumference and diameter of a circle...). Typical usage
<PRE>
y = pi
</PRE>
<P>
This value is approximately 3.141592653589793.
<H3>Example</H3>
The following example demonstrates the use of the <code>pi</code> function.
<PRE>
--> pi
ans =
3.1416
--> cos(pi)
ans =
-1
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