error

throws a new error of Error type. takes any number of arguments that can be converted to a string. uses o.string internally. use this because its shorter (when minified) that new Error(‘asdf’);

(function () {

var takes_a_number = function (n) {
	if (typeof n !== 'number') {
		o.error('FFFFFFFFFFFFUUUUUU');
	}
	return n + 1;
};
takes_a_number('hi'); // error

})();