<p>A double precision data type specifies how a numeric value, such as an integer or real number, is stored in memory.
Typically this occupies two words in computer memory, where the byte length of a word depends on machine address size of the computer processor.
For example, on 32-bit machine architectures, a word is four bytes, and so double precision data value on a 32-bit machine architecture occupies eight bytes of memory.
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