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trying out microcrontroller lesson 2
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HTML
Hypertext Markup Language
HTML file is a text file containing small markup tags
Markup tags
Tell the Web browser how to display the page
HTML files have .htm or .html file extension
WYSIWYG
What You See If What You Get (editor)
Creating an HTML page
1. First tag is <html>
2. Then <head> tag with <title>
3. Then <body> tag with content
HTML tags
Used to mark-up HTML elements
Surrounded by angle brackets < and >
Usually come in pairs
Some HTML tags don't need a pair (br, p, img, hr)
Tag attributes
Provide additional information about the HTML elements
Come in name/value pairs like name="value"
Heading tags
<h1>
<h2>
<h3>
<h4>
<h5>
<h6>
Heading alignment
Can be set to left (default), right, or center
Paragraph tag
<p> defines a paragraph
Line break tag
forces a line break
Comment tag
<!-- This is a comment -->
Horizontal rule tag
<hr> inserts a horizontal rule
Text formatting tags
HTML entities
Special characters that need to be represented with a code like < for <
Anchor tag
<a href="url">link text</a>
Can link to another website or a section on the same page
Email link
<a href="mailto:email@example.com">email@example.com</a>
Unordered list tags
<ul><li>item</li></ul>
Ordered list tags
<ol><li>item</li></ol>
Image tag
<img src="image.jpg">
Text styling
Can be changed using CSS styles like font-family, color, size, weight
Table tags
<table><tr><td>cell</td></tr></table>
Can use colspan and rowspan to merge cells
Table styling
Can set background color, border, padding etc using CSS
Body tag
Can set background color or image, and default text color
HTML allows centering of text, images and tables
HTML colors
Defined using hexadecimal RGB values from #00 to #FF
body tag
Allows you to specify a background color or a background image
body tag
Allows you to specify the default text color
Centering Text, Image and Table
Allows you to position any HTML element in the center of the window
Colors are displayed combining RED, GREEN, and BLUE light sources
Colors defined using hexadecimal notation
Combination of Red, Green, and Blue color values (RGB), each ranging from #00 (lowest) to #FF (highest)
Summary of tags learnt so far
html
head
title
body
p
br
b
i
u
s
img
ol
ul
li
a
table
tr
td
nbsp
lt
gt
hr
!--Comment --
style="color: xxx"
style="text-align: xxx"
style="background-color: xxx"
style="background-image: url(xxx)"
style="display: block; margin-left: auto; margin-right: auto"
style="margin-left: auto; margin-right: auto"
Form
An area that can contain form elements
Form elements
Elements that allow the user to enter information (like text fields, textarea fields, drop-down menus, radio buttons, checkboxes, etc.) in a form
form tag
Encloses form elements and other HTML elements, specifies where the data is sent and the method (get or post)
input tag
Defines the field types and the names of the variables, allows the visitor to enter information or to select choices
Input Types
text
radio
checkbox
password
submit
reset
button
hidden
Radio buttons belonging to the same group must have the same name
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