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(g77-295.info)ATan Intrinsic

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ATan Intrinsic
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     ATan(X)

ATan: `REAL' function, the `KIND=' value of the type being that of
argument X.

X: `REAL'; scalar; INTENT(IN).

Intrinsic groups: (standard FORTRAN 77).

Description:

   Returns the arc-tangent (inverse tangent) of X in radians.

   Note: Tan Intrinsic, for the inverse of this function.