[cfloat.syn]

# 17 Language support library [[support]](./#support)

## 17.3 Implementation properties [[support.limits]](support.limits#cfloat.syn)

### 17.3.7 Header <cfloat> synopsis [cfloat.syn]

[ð](#header:%3ccfloat%3e)

// all freestanding#define __STDC_VERSION_FLOAT_H__ 202311L#define FLT_ROUNDS *see below*#define FLT_EVAL_METHOD *see below*#define FLT_RADIX *see below*#define INFINITY *see below*#define NAN *see below*#define FLT_SNAN *see below*#define DBL_SNAN *see below*#define LDBL_SNAN *see below*#define FLT_MANT_DIG *see below*#define DBL_MANT_DIG *see below*#define LDBL_MANT_DIG *see below*#define FLT_DECIMAL_DIG *see below*#define DBL_DECIMAL_DIG *see below*#define LDBL_DECIMAL_DIG *see below*#define FLT_DIG *see below*#define DBL_DIG *see below*#define LDBL_DIG *see below*#define FLT_MIN_EXP *see below*#define DBL_MIN_EXP *see below*#define LDBL_MIN_EXP *see below*#define FLT_MIN_10_EXP *see below*#define DBL_MIN_10_EXP *see below*#define LDBL_MIN_10_EXP *see below*#define FLT_MAX_EXP *see below*#define DBL_MAX_EXP *see below*#define LDBL_MAX_EXP *see below*#define FLT_MAX_10_EXP *see below*#define DBL_MAX_10_EXP *see below*#define LDBL_MAX_10_EXP *see below*#define FLT_MAX *see below*#define DBL_MAX *see below*#define LDBL_MAX *see below*#define FLT_EPSILON *see below*#define DBL_EPSILON *see below*#define LDBL_EPSILON *see below*#define FLT_MIN *see below*#define DBL_MIN *see below*#define LDBL_MIN *see below*#define FLT_TRUE_MIN *see below*#define DBL_TRUE_MIN *see below*#define LDBL_TRUE_MIN *see below*

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L1870)

The header [<cfloat>](#header:%3ccfloat%3e "17.3.7 Header <cfloat> synopsis [cfloat.syn]") defines all macros the same as
the C standard library header [<float.h>](support.c.headers.general#header:%3cfloat.h%3e "17.15.1 General [support.c.headers.general]")[.](#1.sentence-1)

See also: ISO/IEC 9899:2024, 5.2.4.2.2
