[Main]
Name=HALF_PI
Type=Constant
Header Files=math.h, timath.h
Definition=#define HALF_PI (1.570796326794897)

[Description]
A constant with value <A HREF="$$LINK(timath.h/PI)">PI</A>/2.

[Explanation]
HALF_PI is a predefined floating point constant which approximates <A HREF="$$LINK(PI)">PI</A>/2 up to
16 significant digits, i.e. <CODE>1.570796326794897</CODE>.
Of course, it is the same as <CODE>PI/2.0</CODE>.
