The 'How to' to "Writing it like this" and "Writing it like that"
I am aware of the fact that a discussion on this topic (I guess the title startled you a bit?) had been started once. But I lost track of it. Edit: rumnraisin linked it. Here it is: Formatting Codes
So I'm here to record how to write stuff in italics, bold, italics+bold, extra-large, highlighted, make separate points, get horizontal lines, etc on here. So any information on any of these will be highly appreciated. Once I get all of it, I'll make sure I'll add it over here.<h1>Italics</h1>
Add an asterisk (*) on either side of the portion of the text you want italised. Eg.,
Add two asterisk marks (*) on either side of the portion of text you want to see in bold. Eg.,
Add three asterisk marks (*) on either side of the text. Eg.,
Add a "hash-tag" before your writing. This is what I'm doing for the sub-headings here. Eg.,
There are five different sizes for you. Adding a single # will give you the largest text while adding five will give you the smallest. Adding a sixth.....
creepy grey writing in full block. :P<h1>Make separate points</h1>
Add one asterisk (*) before the specific point when you begin in a new line. The asterisk will appear as what I usually call a "bullet". Eg.,
With the help of aaditsingh8, HappyEvilSlosh and Pratyush., I found that you can get a horizontal line by putting three or more hyphens. [All three provided different values...] Like so:
---- and so on. Eg.,
<h1>Add a link</h1>
You can just copy and paste the URL.
Or if you want to add words, you write the text you want in square brackets  and the URL right next to it in brackets (). Eg.,
[Text you want](URL) Eg.,
[TanytopiSal](https://www.duolingo.com/TanytopiSal) becomes TanytopiSal
[According to HappyEvilSlosh]
First put an exclamation mark. Then empty square brackets  and put the image URL in the regular brackets (). Like so:
!(URL) For eg.,
<h1>Highlight something with that yellow colour</h1>
[According to @HappyEvilSlosh] To get text like
this, we use backticks (`) on either side of the text.
Add a "greater than" sign (>) before you write the text. Like so:
>This is a quote. Eg., It becomes this:
This is a quote.
I finally know how to put a picture on!!! This picture makes me smile! :)
italics and bold is
***italics and bold***
# heading 1 on its own line
----- on its own line
a link is
[text you want](url)
a picture is
Duolingo implements a subset of a language called MarkDown that you can google or wikipedia for more markup options.
Using backticks (`), it should just be a fixed-width font but for some reason Duolingo's designers decided to highlight it as well.
Also, you can do the following<h1>X-Large</h1>
Okay, look, click on "edit" on this comment. In place of ">", you should find "gt;". That is probably how HTML reads it. Clear out the "gt;" and replace it with ">". See if it doesn't work and then tell me, okay? :)
What's PPL, by the way? It reminds me of "Pix Premier League" which is basically a marathon of awesome movies on the TV channel Pix...
Hey, girl. You could've tried all that out in one single comment. You didn't need seven. It kinda clutters up, you see.
I actually watched more than a few of those thanks to your link, despite having no knowledge of french whatsoever...Interesting!
I guess that horizontal line is obtained by putting exactly 7 (correct me if I am wrong) -'s (-------)
These are all HTML
A tutorial for horizontal lines can be found here
Edit: Having read HappyEvilslosh's comment, I stand corrected. These commands are "MarkDown" which appears to have some overlap with HTML. In that case, one might still have to use commands like the ones I mention below on sites other than Duolingo (which don't necessarily support all of these commands as is). HTML, on the other hand, is read directly by the browser and does not require support from the host site.
To my surprise, the brackets and parenthesis work perfectly. Before, I had been using the <href>...etc tag, which is a much more complicated command to type.
As for pictures, the command is <img src="URL of picture">. With sites which facilitate image linking, you should be able to find the proper address by clicking on the picture in situ.
Keeping in mind that hotlinking to a picture on a third party site that doesn't explicitly give you permission to do so (like imgur) is bad netiquette.
I had considered mentioning this and am glad that you did for me. The reason for this is that loads it the file from the website's server each time, which eats into [NOT FREE!] bandwidth charges. When abused (intentionally or not) this is called "bandwidth banditry" and can actually cause "small" sites with low bandwidth plans to to go offline for the remainder of the billing period. So, definitely use this tag (and other remote linking operations) only with foresight and caution. One solution I have heard is hosting all images you want to link (again, with proper permission) on your own server.
I had considered mentioning this and am glad that you did for me.
I'm pleased that's the case. I umm-ed and uhh-ed a bit before posting because I have work that needs doing and posting about things that in general shouldn't be done can be quite the can-of-worms opener. :P
These commands are "MarkDown" which appears to have some overlap with HTML.
The overlap is that one day someone, John Gruber, decided that for writing things like forum posts HTML was a pain. So they created MarkDown as a language for which the source code is both easily readable by a human and describes formatting achievable by HTML. I actually like it so much that I use it in in e-mails (people who send HTML e-mails should be ashamed of themselves, *cough*Duolingo*cough*).
HTML, on the other hand, is read directly by the browser and does not require support from the host site.
Try it. You'll find on Duolingo at least, and I bet many other websites, a lot of HTML will be stripped out of what you want to post.