Arrays

Question 1

What is a variable that represents a list of values? Answer with one word.

Answer 1

array

Question 2

An array comprises any number of ______. (“Values” would be correct, but I’m looking for another word.)

Answer 2

elements

Question 3

The number inside the square brackets is the element’s ____.

Answer 3

index

Question 4

In an array, the numbering starts with __.

Answer 4

0

Question 5

Create a new array, nums, comprising three numbers from 3 to 5.

Answer 5

var nums = [3, 4, 5];

Question 6

var names = [“Alf”, “Bo”, “Gail”];

Answer 6

alert(names[2]);

Question 7

Create an array with a single element, a string. The array hasn’t been declared beforehand.

Answer 7

var airlines = [“Delta”];

Question 8

Create an array with three elements that are numbers. It hasn’t been declared beforehand.

Answer 8

var winningNumbers = [141, 12, 8890];

Question 9

Assign to a variable the first element of an array. The variable hasn’t been declared beforehand.

Answer 9

var mealExpense = expenses[0];

Question 10

Create an array with three elements: a number, a string, and a variable. The array has been declared beforehand.

Answer 10

list = [1, “one”, one];

Question 11

Create an array with two string elements. Then assign the last element in the array to a variable. Neither the array nor the variable have been declared beforehand.

Answer 11

var networks = ["NBC", "CBS"];
var net2 = networks[1]

Question 12

var names = [“Alf”, “Bo”, “Gail”];

Answer 12

alert(names[2]);