In the lectures I talked about the notion of typing, and about how strict these typing checks can be. So, even for very dynamic languages that assign types at run-time, extensive type checking still takes place. For example, the assignment "x = 4 + myDog", where myDog is some sort of object, would fail the type check and would produce a run-time error.

Other languages are much less strict with type checking and, as a result, something like the following...

 "426" + 63

would be OK and would produce "42663".

Which of the following languages would allow this type of operation without producing a run-time error?