double C Keyword double
Data type
A double is the data type that encodes a double-precision
floating-point number. On most machines, sizeof(double) is
defined as four machine words, or eight chars. If you wish your
code to be portable, do not use routines that depend on a double
being 64 bits long.
Different formats are used to encode doubles on various machines.
These formats include IEEE, DECVAX, and BCD (binary coded
decimal), as described in the entry for float.
***** See Also *****
C keywords, data formats, float, portability
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