Auto type deduction and initialization

- [Instructor] The keyword auto tells a compiler…to deduce the type of variable…by the expression used to initialize it.…Unlike other types,…auto requires the variable to be initialized,…so there's no chance of a variable…running around uninitialized,…preventing a difficult-to-find bug.…Auto also helps us to write our code to interfaces…and not to implementations, avoiding tight coupling.…If you need a specific type,…you can use auto with type initialization.…Let's take a look at a few examples.…

Let's try to create a vector event.…First, we initialize alpha to a vector event…with the values one, two, and three.…We try to do something similar with auto…but we get a syntax error.…Since initialization of auto…expects one expression, not three.…We then try to declare gamma…with auto and an initializer list.…The compiler is okay with it, but we created a variable…of type initialize list event, not vector event.…

Then we defined delta with a vector event…and an initialize list, that works,…and gives us what we were looking for.…