Learning JavaScript on Codecademy

Here is a list of things I learned/googled that I don’t want to forget:

An instance is an object that has been created and exists in memory

Operators are symbols that are used to perform operations

Methods are actions that you can perform

Codeacademy uses ‘append’ a lot, which I never say. Googled it to check…means add onto the end!

You can find properties and methods of different objects in the JavaScript documentation e.g. the Math object https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math

Generate a random number between 0–100

console.log(Math.random() *100); 

…and then round it to the nearest whole

console.log(Math.floor(Math.random() *100));

I used the documentation to find this next bit, woo!

console.log(Math.ceil(43.8));

This returns the smallest integer greater than or equal to a decimal num.

You can write single line comments with //blah blah

You can write multiple line comments with /* blah blah blah blah blah blah */

There are 7 fundamental data types in JavaScript: strings, numbers, booleans, null, undefined, symbol, and object.

All the details from the Intro to JavaScript module can be found here https://www.codecademy.com/learn/introduction-to-javascript/modules/learn-javascript-introduction/reference

Originally posted this on medium.