I am new to Arduino and iam using Arduino uno board
i have ATMEGA328P which is a 8 bit AVR micro controller
one question that arouses in my mind is that if uno board contains a avr micro controller that means we have to deal with programming a AVR 8 bit Microcontroller.. so why a special name or device ARDUINO?
Arduino is the name for the entire system - the IDE, the files that go into making the bootloader and libraries and and macros and classes and functions etc. that make it easier to write a sketch, which is processed & compiled into a .hex file that is loaded into the microcontroller when you press the Upload button.
Under File:Preference, select Verbose Outputs and you can see the steps that go on as part of the process.