lround

Rounds it's argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction.

If x is infinite or double.NAN, or if the rounded value is outside the range of the return type, the numeric result is unspecified.

A domain error may occur if the magnitude of x is too large.

Example: Round double to long:

public static int main (string[] args) {
	// Output:
	//  ``lround (1.3) =  1``
	//  ``lround (1.4) =  1``
	//  ``lround (1.5) =  2``
	//  ``lround (1.6) =  2``

	print ("lround (%.1lf) =  %li\n", 1.3, Math.lround (1.3));
	print ("lround (%.1lf) =  %li\n", 1.4, Math.lround (1.4));
	print ("lround (%.1lf) =  %li\n", 1.5, Math.lround (1.5));
	print ("lround (%.1lf) =  %li\n", 1.6, Math.lround (1.6));

	return 0;
}

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

Parameters:

x	A numeric value.