double_t(3type) | double_t(3type) |
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
2023-10-31 | Linux man-pages 6.7 |