What's the difference between a single precision and double precision floating values?
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2Did you try some search first? – Eugene Sh. Feb 12 '20 at 21:15
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err... the precision. More specifically approximately 6 significant decimal digits vs 15 for single and double precision respectively. – Clifford Feb 12 '20 at 23:36
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In C, double has at least as much precision as, and usually more than, float, and has at least the exponent range of, and usually more than, float.
The C standard only requires that double be able to represent all the values of float: “The set of values of the type float is a subset of the set of values of the type double…” (C 3028 6.2.5 10).
In typical common implementations today, float is represented with 32 bits in the IEEE-754 binary32 format, and double is represented with 64 bits in the binary64 format.
Eric Postpischil
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Single precision (float) is stored in 4 bytes (32bits). Double precision (double) is stored in 8 bytes (64bits).
Kedriik
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