The 'atan2' function returns a tangent value(=radian).
double @atan2(double y, double x);
Parameters
double y : y-coordinate
double x : x-coordinate
Return Value
Radian ( -¥ð ¡Â ¥è ¡Â ¥ð )
Example
value = @atan2(2, 1);
Description : The tangent value of coordinate(2,1) is stored in the variable named 'value'.
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