Hex to Binary, Binary to Hex

$ A2F = % 1010 0010 1111$ 345 = % 0011 0100 0101

Binary to Hex is just the opposite, create groups of 4 bits starting with least significant bits. If last group does not have 4 bits, then pad with zeros for unsigned numbers.% 1010001 = % 0101 0001 = $ 51

Padded with a zero

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