For integers, there are usually four representations:
Binary: full two into one, starting with 0b or 0B
Decimal: full decimal one,
Octal: full eight into one, starting with 0
Hexadecimal: full 16, starting with 0x or 0X, AF is not case sensitive
The data is stored in two's complement form at the bottom layer
Original code, inverse code, complement code
All numbers are stored in two's complement form under the hood
The original, inverse, and complement of integers are the same
The complement of a negative number is the original code except the sign bit, and the other bits are inverted. The complement is the complement +1.
conversion between bases
