Need info about the internals of printf

[Eswar Chandra Tadikonda <teswarsrinivas at gmail dot com>]

Hi,

I am going through the glibc source code cloned from the git repository. I
am quite interested on how the printf function works really under the code
to print the characters on display.

I actually got stuck at __vfprintf_internal function which i am not able to
find the definition through tags. BTW, is this the actual function called
internally by printf ?

Can you please help me on this code learning ?

Also please suggest me the right tools/method to traverse through the
source code...

Thanks,
Eswar