This content originally appeared on DEV Community and was authored by DevCronin
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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This content originally appeared on DEV Community and was authored by DevCronin
DevCronin | Sciencx (2021-09-19T20:22:55+00:00) LEVEL UP with JavaScript! LVL 7. Retrieved from https://www.scien.cx/2021/09/19/level-up-with-javascript-lvl-7/
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