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A2 1.4.1 - Data Types


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range and precision
fixed point binary limits the ... of values that can be represented in a given number of bits
normalising floating point
process of moving the binary point of a floating point number to provide the maximum level of precision for a given number of bits
mantissa
the size of the ... will determine the precision of a floating point number
exponent
the size of the ... will determine the range of numbers that can be stored in the floating point number
underflow
when a number is too small to be represented in the allotted number of bits
overflow
when the result of a calculation is too large to be held in the number of bits allocated
logical shift
this causes the bits to move up or down and a 0 will be added onto the corresponding end
arithmetic shift
this causes the bits to move up and down, and a 0 or 1 will be added to the corresponding end depending on the number's original sign
circular shift
the bits move up and down, and the end bit will then move back round to the corresponding end