Bits

Hi /prog/rammers...

I'm an hobby programmer and I'm here to ask a really simple question... I tried to google it but I don't even know where to start my search

the notation:
0x00 = 00000000
how it is called?
how can I convert an 8bit array in this form?
for example how can I discover the notation or the bit pattern?
?? = 00110100
0xff = ??

can someone explain me the logic behind?

thank you...

yes is elementary... but although I understand a bit of "high level programming" this notation seems a bit obscure to me...

I never had a programming lecture... I swear... even though I could make this: http://www.youtube.com/watch?v=8IUnqm8j4BE

But anyway thx!

so just to be clear:
10 = 0xa = 00001010

is this right?