Meaning from 0x00 to 0xFF

For binary, the 8-bit binary we call a byte, the binary expression range value is from 0b00000000~0b11111111, and our program is in hexadecimal representation from 0x00 to 0xFF, here teaches you a binary conversion decimal and hexadecimal method, Binary 4-bit group, followed by 8,4,2,1 law such as 1010, then from the highest bit, the number is 8*1+4*0+2*1+1*0 = 10, then the decimal is 10, hexadecimal is 0xA. In particular, when binary to hexadecimal, a hexadecimal one is exactly the same as the binary 4-bit correspondence, these people do not need to force memory, with a few times on the proficiency.

Meaning from 0x00 to 0xFF