Android is an open-source, Customisable, user-friendly mobile operating system developed by Google for devices such as smartphones, tablets and watches. The first version of android was released in September 2008. The first two versions were not given any names; just Android 1.0 and Android 1.1.
The interesting fact about of different versions of android is that the names of OS are named after sweets in an alphabetical order. The different versions of android includes Cupcake, Donuts, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich, Jelly Bean, Kit Kat, Lollipop, Marshmallow and Nougat. An infographic from Top App Creators
, explains full details about the different versions of android mobile operating systems.