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JavaScript Work Out - Arrays

memorize.ai (lvl 286)

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Access elements in an array

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JavaScript Web Dev

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Mar 1, 2020

Cards (9)

Section 1

(9 cards)

Access elements in an array

Front

referring to the index number. var name = cars[0];

Back

Difference Between Arrays and Objects

Front

In JavaScript, arrays use numbered indexes. In JavaScript, objects use named indexes.

Back

Change Array Element

Front

cars[0] = "newValue";

Back

Add Element to Array Using length

Front

var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits[fruits.length] = "Lemon"; // adds a new element (Lemon) to fruits

Back

push method

Front

add a new element to an array

Back

Array Syntax

Front

var name = [item1, item2, ...];

Back

Array

Front

used to store multiple values in a single variable.

Back

Access Last Array Element

Front

var last = fruits[fruits.length - 1];

Back

length property

Front

returns the length of an array (the number of array elements).

Back