1double_t(3type)                                                double_t(3type)
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NAME

6       float_t, double_t - most efficient floating types
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LIBRARY

9       Math library (libm)
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SYNOPSIS

12       #include <math.h>
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14       typedef /* ... */ float_t;
15       typedef /* ... */ double_t;
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DESCRIPTION

18       The  implementation's most efficient floating types at least as wide as
19       float and double respectively.  Their type depends on the value of  the
20       macro FLT_EVAL_METHOD (defined in <float.h>):
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22       FLT_EVAL_METHOD       float_t      double_t
23       ────────────────────────────────────────────
24              0                float        double
25              1               double        double
26              2          long double   long double
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28       For  other values of FLT_EVAL_METHOD, the types of float_t and double_t
29       are implementation-defined.
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STANDARDS

32       C11, POSIX.1-2008.
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HISTORY

35       C99, POSIX.1-2001.
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SEE ALSO

38       float.h(0p), math.h(0p)
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42Linux man-pages 6.04              2023-03-30                   double_t(3type)
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