HP Fortran Programmer's Reference (September 2007)

Intrinsic procedures
Intrinsic procedure specifications
Chapter 11 529
ATAN2D(Y, X)
Description
Arctangent (inverse tangent) function in degrees.
Class
Elemental nonstandard function.
Arguments
Y must be of type real.
X must be of the same type and kind type parameter as Y.
Result type/
type parameters
Same as X.
Result value
The result has a value equal to a processor-dependent approximation to the principal value of
the argument of the complex number (X, Y), expressed in degrees, that lies in the range
-90 < ATAN2D(Y,X) < 90.
Specific forms
DATAN2D,QATAN2D.
ATAND(X)
Description
Arctangent (inverse tangent) function in degrees.
Class
Elemental nonstandard function.
Argument
X must be of type real.