---
description: "Learn more about: <cfloat>"
title: "<cfloat>"
ms.date: "11/04/2016"
f1_keywords: ["<cfloat>"]
helpviewer_keywords: ["cfloat header"]
ms.assetid: 25ec4ab9-3c1d-46e3-9e68-ad9a8762cadb
---
# `<cfloat>`

Includes the Standard C library header \<float.h>.

## Syntax

```cpp
#include <cfloat>
```

## Definitions

```cpp
#define FLT_ROUNDS
#define FLT_EVAL_METHOD
#define FLT_HAS_SUBNORM
#define DBL_HAS_SUBNORM
#define LDBL_HAS_SUBNORM
#define FLT_RADIX
#define FLT_MANT_DIG
#define DBL_MANT_DIG
#define LDBL_MANT_DIG
#define FLT_DECIMAL_DIG
#define DBL_DECIMAL_DIG
#define LDBL_DECIMAL_DIG
#define DECIMAL_DIG
#define FLT_DIG
#define DBL_DIG
#define LDBL_DIG
#define FLT_MIN_EXP
#define DBL_MIN_EXP
#define LDBL_MIN_EXP
#define FLT_MIN_10_EXP
#define DBL_MIN_10_EXP
#define LDBL_MIN_10_EXP
#define FLT_MAX_EXP
#define DBL_MAX_EXP
#define LDBL_MAX_EXP
#define FLT_MAX_10_EXP
#define DBL_MAX_10_EXP
#define LDBL_MAX_10_EXP
#define FLT_MAX
#define DBL_MAX
#define LDBL_MAX
#define FLT_EPSILON
#define DBL_EPSILON
#define LDBL_EPSILON
#define FLT_MIN
#define DBL_MIN
#define LDBL_MIN
#define FLT_TRUE_MIN
#define DBL_TRUE_MIN
#define LDBL_TRUE_MIN
```

## See also

[Header Files Reference](../standard-library/cpp-standard-library-header-files.md)\
[C++ Standard Library Overview](../standard-library/cpp-standard-library-overview.md)\
[Thread Safety in the C++ Standard Library](../standard-library/thread-safety-in-the-cpp-standard-library.md)