Arduino inbuilt liberaries and functions

Projects Programming
1

is there any way to find out what inside Arduino inbuilt liberaries and functions

i mean to say is there any way i can read out the code of a inbuilt functions of inbuilt examples of arduino... for eg. if i want to find out how writing a text or scrolling of a text on the LCD works by using the inbuilt examples of Arduino and the functions used in it..

suggest me plz... im eager to know how these inbuilt functions work

2

You can look at the code with a text editor in the libraries folder.
Look for the .cpp and .h files

3

and check these - avr-libc: Modules -