Example: Check whether the double represents a number

• Package Index
• Example Listing

public static int main (string[] args) {
	float f1 = -1.1f;
	float f2 = 1.1f;
	float f3 = float.NAN;
	float f4 = Math.sinf (float.INFINITY); // domain error

	// Output: ``false``
	print ("%s\n", f1.is_nan ().to_string ());
	// Output: ``false``
	print ("%s\n", f2.is_nan ().to_string ());
	// Output: ``true``
	print ("%s\n", f3.is_nan ().to_string ());
	// Output: ``true``
	print ("%s\n", f4.is_nan ().to_string ());

	return 0;
}

 valac --pkg glib-2.0 float.is_nan.vala -X -lm

See:

• float.is_nan

• Package Index
• Example Listing