Zachary Cronin
Dev Cronin

Dev Cronin

LEVEL UP with JavaScript! LVL 7

LEVEL UP with JavaScript! LVL 7

Zachary Cronin's photo
Zachary Cronin

Published on Sep 19, 2021

2 min read

In this blog series tutorial, I will be covering some of the basic JavaScript programming concepts.

This is geared toward beginners and anyone looking to refresh their knowledge.

See the Previous Level Here

Level 7 will cover:

  • Store Multiple Values in One Variable Using JavaScript Arrays
  • Nest One Array Within Another Array
  • Access Array Data With Indexes
  • Modify Array Data

Store Multiple Values in One Variable Using JavaScript Arrays

Multiple values can be stored together by enclosing them with brackets []. These can be any combination of strings and/or numbers.


let myArr = ["Natural", 20];

Nest One Array Within Another Array

Nesting arrays within another array is also possible by using brackets inside of brackets. This is referred to as multi-dimensional array.


let multiDimensionalArray = [
    ["Hit points", 30], 
    ["Damage", 15]
];

Access Array Data With Indexes

Indexes are a way to reference and then access data inside of an array. They use brackets and specify an entry in an array. Arrays use Zero-based indexing (starts the count from zero).


let diceArray = [2,5,6,4,1,1];

diceArray[3];

// 4

Modify Array Data

The entries of arrays are able to be changed, and this is referred to as mutable.


let diceArray = [2,10,8,7];

diceArray[0] = 4;

diceArray[0];

// 4

// Now the 2 in our array is 4

Thank you for reading my blog! This is the seventh of my series on JavaScript so if you would like to read more, please follow!

See the Next Level Here

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