front-end-developer_1_

Front-End-Developer - Level 1
02.Arithmetic
Embedded Video: https://www.youtube.com/watch?v=fDiZAeu7sIs?rel=0
Now that you have the basics of HTML and CSS under your belt, we're going to start
learning our first programming language: JavaScript. Remember, web browsers can only do
three things: display content with HTML, style it with CSS, and change what's displayed with
JavaScript. Because all browsers support JavaScript, it's the de facto programming
language of the web.
We're going to take a detour away from the aesthetically pleasing and obviously useful world
of web pages, so that we can learn some programming fundamentals. But don't worry! We'll
be back in no time.
Like earlier, I'm going to assume you're using Google Chrome for these lessons. Chrome
includes a nice little console that lets you type in JavaScript code. To access it, click on the
☰ button, go to the Tools menu, and click JavaScript Console. As a shortcut, you can also
press Cmd + Alt + J.
Here at the > prompt, you can type JavaScript and see what it does. Try typing 1 + 2; and
pressing Enter.
Congratulations! You just ran your first JavaScript code.
You should see something like:
1 + 2;
3
JavaScript took your code - 1 + 2 - ran it, and returned the result - 3 .
The semicolon at the end of the line tells JavaScript to run everything before it. You'd think
JavaScript would know on its own, wouldn't you?
Now try these:
Arithmetic
96