List of the top free online computer programming courses. Learn about what courses are available and what topics they cover to find the course that's right for you.
JavaScript
HTML & CSS
Jquery
Python
Ruby
PHP
WordPress
Linux & Shell Scripting
Objective-C (iOS &Mac)
Java
Programming in Java,
Android
For angular, HTML and CSS go for W3Schools.
For PHP, Lynda (Videos)is one of best source.
Once you become familiar with these languages here,
afterwards, you should use Stack Overflow for any doubt.