atan


Description:

public double atan (double x)

Calculates the arc tangent of x.

Note:

Remember to link the math library: valac -X -lm ...

Example: Arc tangent (double):

public static int main (string[] args) {
// Output: ``atan (0.632500) = 0.563974``
double x = 0.6325;
double result = Math.atan (x);
print ("atan (%lf) = %lf\n", x, result);

// Output: ``atan (0.000000) = 0.000000``
x = 0;
result = Math.atan (x);
print ("atan (%lf) = %lf\n", x, result);

// Output: ``atan (1.570796) = 1.003885``
x = Math.PI / 2;
result = Math.atan (x);
print ("atan (%lf) = %lf\n", x, result);
return 0;
}

valac --pkg glib-2.0 -X -lm GLib.Math.atan.vala


Namespace: GLib.Math
Package: glib-2.0