Can ny1 explain the specific use of html, css, java, javascript, ruby, python, c++, php? which one is for what? thanks in advnce

Answer 1

let's start with
html-hypertext markup language
simply if u want to make a website you would need a html file. this is where the content is present but only static content you can store pictures, videos, paragraphs, audio. but remember it is not a programming language.
css-cascading style sheet
well just like html you would also need css it is used to define the style of words colours, etc. it is not mandatory and is a part of html.
javascript ----
what if u want to make a website which have a form and only accepts any request if age is more than 28. you need javascript. it is required to interact with client or user.
python---
it is a programming language suppose you need to do something logical it can be used.
java---
same as python only syntax is different
c++----
same as java and other only syntax is different
ruby----
same only syntax is different
php--
a lot like javascript.

Answer 2

Html website structure
css website style
javascript website functionality
php website server interaction (cookies,login etc.)

c++ performance desktop programms (games, editing, operation system...) + many possibilties

java portable desktop applications->not performant because of using a virtual machine
android (feamework is almost pure java)

phyton scripts
ruby server scripts