NAME

       float_t, double_t - most efficient floating types

LIBRARY

       Math library (libm)

SYNOPSIS

       #include <math.h>

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

DESCRIPTION

       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

       C11, POSIX.1-2008.

HISTORY

       C99, POSIX.1-2001.

SEE ALSO

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