1. How does an if-then(-else) statement end?
   With the reverse of the word if: fi
2. How can we use regular expression search patterns in a conditional evaluation?
   By employing the =~ comparison symbol. For example: [[ ${var} =~ [[:digit:]] ]]
3. Why do we need the elif keyword?
   If we want to sequentially test for more than one condition, we can use else if (elif).
4. What is nesting?
   Using an if-then-else statement or loop within another if-then-else statement or loop.
5. How can we get information about how to use shell builtins and keywords?
   By using the command help, followed by the builtin or keyword we want information about. For example: help [[
6. What is the opposite keyword of while?
   until. A while loop runs until the condition is no longer true, an until loop runs until the condition is no longer false.
7. Why would we choose the for loop over the while loop?
   for is more powerful and has many convenient shorthand syntaxes which would be hard or unreadable with while.
8. What is brace expansion and on which characters can we use it?
   Brace expansion allows us to write very short code, which generates a whitespace delimited list based on ASCII characters. For example: {1..10} prints the numbers 1 through 10, with spaces in between. We can also use this for uppercase or lowercase letters, or any range in the ASCII character set.
9. Which two keywords allows us to have more granular control over loops?
   break and continue. break stops the current loop, while continue jumps to the next iteration in the loop.

10. If we are nesting loops, how can we employ loop control to influence outer loops from an inner loop?
    By adding a number higher than 1 to the break or continue keyword. Example: break 2 exits from both the inner and one outer loop.