WHAT IS HTML?
HTML (HyperText Markup Language, HTML) is a markup language. You are using HTML to mark up a text document. In other words, it is responsible for the location in the document of your texts, drawings, tables intended for life on the Internet - this is in simple words.
In other words, web page consists from different elements, and HTML helps to define the placement of web page elements relatively to each other.
WHAT IS A DOCTYPE AND WHY IS IT NEEDED?
DOCTYPE is a Document Type Definition (DTD), the rules by which a particular XML or (X)HTML document (web page) is validated. Through this entry, the browser determines which version of the DTD is used in a given document. And it is needed so that browsers correctly display the markup of the document. If you do not specify DOCTYPE, then the browser will add "something from itself", and each browser will add its own "something from itself". As a result, there can be no talk of any cross-browser compatibility.
HOW DOES DIV DIFFERENT FROM SPAN?
div is a block container and span is inline. Containers are something that anything else can be nested in. div is used for block layout and span is for text. div forms a block from what is in it from a new line and after it the element comes from a new line (if you do not change the behavior with CSS), and the span does not create new line and "fits".
HOW ARE COMMENTS IN HTML?
<!-- like this→
LINKS. HOW TO SET THE ADDRESS OF THE DOCUMENT TO GO TO?
<a href="https://it-bulls.com/example/example.html">Absolute Link</a>
<a href="../../example/example.html">Relative link</a>
HOW TO MAKE A LINK TO EMAIL?
<a href="mailto:testmail@mail.com">E-mail me</a>
WHAT DO THE <EM></EM> TAGS DO?
Display enclosed text in italics.
WHAT IS <OL></OL>, <UL></UL> AND <LI></LI> ?
The <ol><ol> tag sets up an ordered list. Each list item must begin and end with <li><li> tags. If a style sheet is applied to the <ol> tag, then the <li> elements inherit these properties. The <ul> tag sets up an unordered (bulleted) list.
WHAT DO WE USUALLY PUT INTO THE HEAD TAG?
This tag includes:
The title tag: This is a very important tag, especially from an SEO standpoint. How is it prescribed? With <title></title> tags. That is, it turns out something like this: <title>The title of your web document</title>;
Meta tags. Meta tags are mainly needed for three things: to register the encoding, description and keywords.
Also, inside the head tags, the path to the style sheet is written, this is how the web page and the style sheet are linked, or CSS is written directly on the page, inside the style tags.
All kinds of scripts are listed inside the head tag. How do they connect to the HTML page? Script tags are written indicating the type of language, and inside them, either the script code is written, or the src attribute is used with a value that indicates the path to the script.
WHY ARE THE TAGS <DL>,<DT>,<DD> NEEDED?
The <dl>,<dt>,<dd> tags are designed to create a list of definitions. Each such list begins with a <dl> container, which includes a <dt> tag that creates a term and a <dd> tag that defines that term. The closing </dd> tag is optional because the next tag signals the end of the previous element. However, it is good practice to close all tags.
For example:
<dl>
<dt>Coffee</dt>
<dd>Black hot drink</dd>
<dt>Milk</dt>
<dd>White cold drink</dd>
</dl>
WHY DO THE <TR>, <TH>, <TD> TAGS NEED?
The <tr> tag serves as a container for creating a table row. Each cell within such a row can be specified using the <th> or <td> tag. <th> is designed to create one table cell, which is designated as a header cell. The text in such a cell is displayed by the browser usually in bold and centered. The <th> tag must be placed inside the <tr> container, which in turn is placed inside the <table> tag. <td> is for creating one table cell. The <td> tag must be placed inside the <tr> container, which in turn is placed inside the <table> tag.
IN WHICH CASE IS IT BETTER TO WRITE HTML CODE?
Previously, it was thought to be irrelevant. But with the advent of XHTML, this question has a definite answer - we write all tags, attributes and predefined values in lower case.
IS IT MANDATORY TO WRITE ALT IN <IMG>?
Yes. This is required by the standard, and common sense, as well. Some users still disable pictures and some use text or even voice browsers. If the picture does not carry any semantic load (design element, "spacer", etc.), then you can put the value alt="" in the <img> tag.
WHAT IS ENTITIES?
Entities are combinations of the & sign and an alphabetic or numeric code after it, designed to replace characters that cannot occur "pure" in HTML text, such as the "<" character.