Arrays

Vocabulary

100

What is an array?

A data structure to create a collection or list

200

What are the default values of an int array and double array?

0 & 0.0

300

A single value in an array is an 

Element

400

{1,2,3,4,5,6}

What is the length of the array?

What is the element in the 6 index spot?

500

What would I type in order to find the index of the last element?

list.length-1

Array Creation

100

String [] cars;

What type of primitive data would be stored in this array?

Strings

200

int[] grades = {100,20,44,98,76,22}

System.out.print(grades[4]));

What is the output?

76

300

public static int mystery(int [] arr)

{

return arr[1] + arr[3] /2;

//The mystery method has been called for this array

int[] list = {3,5,3,6,6}

8

400

String [] names = {John,Sally,Mark,Louise}

System.out.println(names[2]));

Error

500

What would I code to find the middle index of an arr. You may assume that the length of the arr is odd

arr[arr.length /2]

Traversing an Array

100

The first element in an array is accessed using this index.

0

200

What type of loop is used to be more detailed when traversing an array?

For loop

300

In javaScript, this loop is designed to work through the array without using an index..

An enhanced for loop / for each loop

400

What does it mean to traverse an array?

To process each element in array one by one

500

What type of loop would you use to traverse an array when you don't know the length?

While