JavaScript Control Flow and Declarations Quiz

Review

1. Which declaration is block-scoped?

   const creates a lexical binding scoped to the block.
2. With score = 82 and branches 90 then 80, which branch runs?

   The first true condition is the score >= 80 branch.
3. Why is break commonly used after a matching switch case?

   Without break, execution can continue into following cases.
4. What does continue do inside a loop?

   continue skips the remaining statements in the current iteration.
5. What does return 42 do inside a function?

   return exits the current function and supplies 42 as its result.
6. What does throw new Error("bad") do?

   throw transfers control as an exception that may be caught.
7. Which clause receives a thrown exception?

   A matching catch clause receives the thrown value.
8. What is finally primarily useful for?

   finally is used for work that should occur after the try/catch path.
9. What does a line break immediately after return do in the restricted form?

   The return production has a no-LineTerminator restriction before its expression.
10. In const total = price * quantity;, what is price * quantity?

    The initializer expression is evaluated to produce the value for total.