double_t(3type) — Linux manual page

double_t(3type)                                          double_t(3type)

NAME         top

       float_t, double_t - most efficient floating types

LIBRARY         top

       Math library (libm)

SYNOPSIS         top

       #include <math.h>

       typedef /* ... */ float_t;
       typedef /* ... */ double_t;

DESCRIPTION         top

       The implementation's most efficient floating types at least as
       wide as float and double respectively.  Their type depends on the
       value of the macro FLT_EVAL_METHOD (defined in <float.h>):

       FLT_EVAL_METHOD       float_t      double_t
       ────────────────────────────────────────────
              0                float        double
              1               double        double
              2          long double   long double

       For other values of FLT_EVAL_METHOD, the types of float_t and
       double_t are implementation-defined.

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       C99, POSIX.1-2001.

SEE ALSO         top

       float.h(0p), math.h(0p)

Linux man-pages 6.04           2023-03-30                double_t(3type)

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