Example: Compute the absolute value
public static int main (string[] args) {
long val = -10;
print ("%ld\n", val.abs ());
return 0;
} valac --pkg glib-2.0 long.abs.valapublic static int main (string[] args) {
long val = -10;
print ("%ld\n", val.abs ());
return 0;
} valac --pkg glib-2.0 long.abs.vala