Try this exercise. Is this statement true or false?

Strict Mode is a new feature in ECMAScript 5 that allows you to place a program, or a function, in a "strict" operating context. This strict context prevents certain actions from being taken and throws more exceptions.

1// Non-strict code...
2
3(function(){
4  "use strict";
5
6  // Define your library strictly...
7})();
8
9// Non-strict code...