atan(3F)                                                 atan(3F)



NAME
     atan, datan - Fortran arctangent intrinsic function

SYNOPSIS
     real r1, r2
     double precision dp1, dp2

     r2 = atan(r1)

     dp2 = datan(dp1)
     dp2 = atan(dp1)

DESCRIPTION
     atan returns the real arctangent of its real argument.
     datan returns the double-precision arctangent of its
     double-precision argument.  The generic form atan may be
     used with a double-precision argument returning a double-
     precision value.

SEE ALSO
     trig(3M).


































Page 1                        CX/UX Hf77 Fortran Reference Manual