for loops: flags, Booleans, array length, and loopus interruptus

Question 1

In one word, what is a flag?

Answer 1

variable

Question 2

What is the keyword that stops a loop from continuing to loop?

Answer 2

break

Question 3

There are two Booleans. Name either one of them.

Answer 3

true
or
false

Question 4

The statement assigns the number of elements in the array to the variable. Fill in the blank.
var num = generals.\_\_\_\_\_\_\_\_;

Answer 4

length

Question 5

Find the number of elements in the array cities and assign the number to the variable numCities, which hasn’t been declared beforehand.

Answer 5

The correct code is:
var numCities = cities.length;

Question 6

Code two lines. The first line reverses the flag x, which was originally set to the positive Boolean. The second line stops the looping.

Answer 6

The correct code:
x = false;
break;

Question 7

Set a flag with an initial Boolean value of your choice.

Answer 7

Sorry, that’s incorrect. An example:
var matchFound = false;
or
var noMatch = true;

Question 8

Find the number of elements in an array and assign the number to a variable, which hasn’t been declared beforehand.

Answer 8

var elements = songbirds.length;

Question 9

Code the first line of a for loop with the usual counter, the usual starting value, and the usual incrementing. Limit the number of loops by the number of elements in the array pets.

Answer 9

for (var i = 0; i < pets.length; i++) {

Question 10

In 3 statements, assign a number to a variable that’s already been declared, assign a Boolean (either one) to a flag that’s already been declared, and interrupt a loop. Don’t indent any of the lines.

Answer 10

Sorry, that’s incorrect. An example:
x = 1;
found = true; (or false;)
break;

Question 11

Complete this code to display an alert if a match isn't found.
var matchFound = false;
for (var i = 0; i < list.length; i++) {
  if (userInput === list[i]) {
    alert("Match found");
    matchFound = true;
    break;
  }

Answer 11

if (matchFound === false) {
alert(“Match not found”);
}