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1 . We start learning programming language with "Hello!World" because if we meet with someone first time , we greet him with word Hello.I think this sentence "Hello! World" is the first step towards the journey of programming.
2. Comments in any programming language help you or other developers understand the code you have written.These comments actually explain the topic of the code.
We write comments in Html as follows :
<!-- comment - - >.
3.In HTML, tags,elements and attributes are very important parts.
-> Tags : it is used to design to structure and layout of the webpage.It is building block for elements.
Tags are of two types:-Opening tag :- <> ,Closing tag :- </>
-> Elements : It is an individual components of the Html to write code.It is made with the help of tags.Eg.heading,body, image
-> Attributes : It is used to provide additional information about the elements.They are added to the opening tag of an element and they always come in the form of name-value pairs.
4. Html entites are reserved keywords in the Html.
Eg. If we want to print ">" in the Html,we cannot print this as it is,because it is Html entity.So ,we print this using ">".