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SYNOPSIS
float atan2(int|float y, int|float x)
DESCRIPTION
Returns the angle part of the polar coordinates of the point (x, y)
in the range (-pi, pi].
Note the exchange of the coordinates x and y in the parameter list
reflecting the sequenz in the gradient to angle transformation
atan(y / x).
HISTORY
LDMud 3.2.9 added integers as arguments.
SEE ALSO
sin(E), cos(E), tan(E), asin(E), acos(E), atan(E)