Bits Bytes and Hex

More then you ever wanted to know about bits bytes and Hex.

  • Bytes32 = uint256

  • 1 bit = can represent 2 numbers – 0 or 1 or 2**1

  • 1 byte = 8 bits and can represent 2**8 =256

  • To convert a byte to a number do the following
    • 10011101 = 2**7 + 2**4 + 2**3 + 2**2 + 2**0 (the power of is a representation of the position of the bit 7,6,5,4,3,2,1,0)
    • =157

  • Hexadecimal = 0,1,2,3,4,5,6,7,8,9,A, B, C, D, E, F
    • A character of hex can be 0-16 which is the same as 2**4
    • 0x denotes hexadecimal. So 0x3EA = 3 * 16**2 + 14*16**1 + 10*16**0
    • =1002

  • 1 byte = 8 bits = 2 hex
    • 1 byte = 8 bits which is the same as 2*4 bit which is the same as 2 hex

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