Table of contents
CSPICE_TWOPI returns the double precision value of the constant 2*PI.
Given:
None.
the call:
twopi = cspice_twopi( )
returns:
twopi twice the value of pi (the ratio of a circle's circumference to
its diameter), determined by the `acos' function.
help, twopi
DOUBLE = Scalar
That is,
cspice_twopi = acos ( -1.0 ) * 2.0
None.
Any numerical results shown for this example may differ between
platforms as the results depend on the SPICE kernels used as input
and the machine specific arithmetic implementation.
1) The following code example returns the double precision value of
the constant 2*PI and prints it out.
Example code begins here.
PRO twopi_ex1
;;
;; Print the double precision value of 2.0*pi
;;
print, FORMAT='("2*Pi: ",F25.22)', cspice_twopi()
END
When this program was executed on a Mac/Intel/IDL8.x/64-bit
platform, the output was:
2*Pi: 6.2831853071795862319959
The first time the function is referenced, the value is computed
as shown above. The value is saved, and returned directly upon
subsequent reference.
Error free.
None.
None.
ICY.REQ
None.
J. Diaz del Rio (ODC Space)
E.D. Wright (JPL)
-Icy Version 1.0.1, 27-AUG-2021 (JDR)
Edited the header to comply with NAIF standard. Added example's
problem statement and reformatted example's output.
Added -Parameters, -Particulars, -Exceptions, -Files, -Restrictions,
-Literature_References and -Author_and_Institution sections.
Removed reference to the routine's corresponding CSPICE header from
-Abstract section.
Added argument's type and size information in the -I/O section.
-Icy Version 1.0.0, 16-JUN-2003 (EDW)
twice the value of pi
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