W3school.com is an educational website where we can solve our programming problems. This site is very helpful to know basics of any programming language. It has all the informations of many languages step by step.
Each concept is explained very precisely and with good and easy examples.You can learn HTML, CSS, JAVASCRIPT, JQUERY, PHP, Java, mysql and many more.
W3Schools is optimized for learning, testing, and training.Examples are very good and explained in easy way. we can try this examples side by side by using its try it yourself feature.
Each concept is explained in very easy language which is easy to understand by a new user.This the best tutorial explains each aspect in form of chapters.
So its is nice very useful.