Namespaces
Variants
Views
Actions

Difference between revisions of "cpp/header/numbers"

From cppreference.com
< cpp‎ | header
(fix typo egmma -> egamma)
(move synopsis to template)
 
(4 intermediate revisions by 4 users not shown)
Line 1: Line 1:
−
{{cpp/header/title|numbers}}
+
{{cpp/header/title|numbers|notes={{mark c++20}}}}
 
{{cpp/header/navbar}}
 
{{cpp/header/navbar}}
 
This header is part of the [[cpp/numeric|numeric]] library.
 
This header is part of the [[cpp/numeric|numeric]] library.
  
 
===[[cpp/numeric/constants|Mathematical constants]] {{mark since c++20}}===
 
===[[cpp/numeric/constants|Mathematical constants]] {{mark since c++20}}===
−
The header {{header|numbers}} provides several mathematical constants, such as {{lc|std::pi}} or {{lc|std::sqrt2}}
+
The header {{header|numbers}} provides several mathematical constants, such as {{lc|std::numbers::pi}} or {{lc|std::numbers::sqrt2}}
  
 
=== Synopsis ===
 
=== Synopsis ===
−
{{source|1=
+
{{cpp/synopsis/numbers}}
−
namespace std::numbers {
+
−
  template<class T> inline constexpr T e_v          = /* unspecified */;
+
−
  template<class T> inline constexpr T log2e_v      = /* unspecified */;
+
−
  template<class T> inline constexpr T log10e_v    = /* unspecified */;
+
−
  template<class T> inline constexpr T pi_v        = /* unspecified */;
+
−
  template<class T> inline constexpr T inv_pi_v    = /* unspecified */;
+
−
  template<class T> inline constexpr T inv_sqrtpi_v = /* unspecified */;
+
−
  template<class T> inline constexpr T ln2_v        = /* unspecified */;
+
−
  template<class T> inline constexpr T ln10_v      = /* unspecified */;
+
−
  template<class T> inline constexpr T sqrt2_v      = /* unspecified */;
+
−
  template<class T> inline constexpr T sqrt3_v      = /* unspecified */;
+
−
  template<class T> inline constexpr T inv_sqrt3_v  = /* unspecified */;
+
−
  template<class T> inline constexpr T egamma_v    = /* unspecified */;
+
−
  template<class T> inline constexpr T phi_v        = /* unspecified */;
+
  
−
  template<floating_point T> inline constexpr T e_v<T>          = /* see description */;
+
{{langlinks|es|ja|zh}}
−
  template<floating_point T> inline constexpr T log2e_v<T>      = /* see description */;
+
−
  template<floating_point T> inline constexpr T log10e_v<T>    = /* see description */;
+
−
  template<floating_point T> inline constexpr T pi_v<T>        = /* see description */;
+
−
  template<floating_point T> inline constexpr T inv_pi_v<T>    = /* see description */;
+
−
  template<floating_point T> inline constexpr T inv_sqrtpi_v<T> = /* see description */;
+
−
  template<floating_point T> inline constexpr T ln2_v<T>        = /* see description */;
+
−
  template<floating_point T> inline constexpr T ln10_v<T>      = /* see description */;
+
−
  template<floating_point T> inline constexpr T sqrt2_v<T>      = /* see description */;
+
−
  template<floating_point T> inline constexpr T sqrt3_v<T>      = /* see description */;
+
−
  template<floating_point T> inline constexpr T inv_sqrt3_v<T>  = /* see description */;
+
−
  template<floating_point T> inline constexpr T egamma_v<T>    = /* see description */;
+
−
  template<floating_point T> inline constexpr T phi_v<T>        = /* see description */;
+
−
 
+
−
  inline constexpr double e          = e_v<double>;
+
−
  inline constexpr double log2e      = log2e_v<double>;
+
−
  inline constexpr double log10e    = log10e_v<double>;
+
−
  inline constexpr double pi        = pi_v<double>;
+
−
  inline constexpr double inv_pi    = inv_pi_v<double>;
+
−
  inline constexpr double inv_sqrtpi = inv_sqrtpi_v<double>;
+
−
  inline constexpr double ln2        = ln2_v<double>;
+
−
  inline constexpr double ln10      = ln10_v<double>;
+
−
  inline constexpr double sqrt2      = sqrt2_v<double>;
+
−
  inline constexpr double sqrt3      = sqrt3_v<double>;
+
−
  inline constexpr double inv_sqrt3  = inv_sqrt3_v<double>;
+
−
  inline constexpr double egamma      = egamma_v<double>;
+
−
  inline constexpr double phi        = phi_v<double>;
+
−
}
+
−
}}
+
−
 
+
−
{{langlinks|ja|zh}}
+

Latest revision as of 07:16, 27 November 2023

 
C++
 
Standard library headers
Algorithms
<algorithm>
<numeric>
Strings
<cctype>
<cstring>
<cuchar> (C++11)
<cwchar>
<cwctype>
<string_view> (C++17)
<string>
Text processing
<clocale>
<codecvt> (C++11/17/26*)
<locale>
<regex> (C++11)
<text_encoding> (C++26)   
Numerics
<cfenv> (C++11)
<cmath>
<complex>
<linalg> (C++26)
<numbers> (C++20)
<random> (C++11)
<valarray>
Time
<chrono> (C++11)
<ctime>
C compatibility
<ccomplex> (C++11/17/20*)
<ciso646> (until C++20)
<cstdalign> (C++11/17/20*)
<cstdbool> (C++11/17/20*)
<ctgmath> (C++11/17/20*)
 

This header is part of the numeric library.

[edit] Mathematical constants (since C++20)

The header <numbers> provides several mathematical constants, such as std::numbers::pi or std::numbers::sqrt2

[edit] Synopsis 

namespace std::numbers {
  template<class T> inline constexpr T e_v          = /* unspecified */;
  template<class T> inline constexpr T log2e_v      = /* unspecified */;
  template<class T> inline constexpr T log10e_v     = /* unspecified */;
  template<class T> inline constexpr T pi_v         = /* unspecified */;
  template<class T> inline constexpr T inv_pi_v     = /* unspecified */;
  template<class T> inline constexpr T inv_sqrtpi_v = /* unspecified */;
  template<class T> inline constexpr T ln2_v        = /* unspecified */;
  template<class T> inline constexpr T ln10_v       = /* unspecified */;
  template<class T> inline constexpr T sqrt2_v      = /* unspecified */;
  template<class T> inline constexpr T sqrt3_v      = /* unspecified */;
  template<class T> inline constexpr T inv_sqrt3_v  = /* unspecified */;
  template<class T> inline constexpr T egamma_v     = /* unspecified */;
  template<class T> inline constexpr T phi_v        = /* unspecified */;
 
  template<floating_point T> inline constexpr T e_v<T>          = /* see description */;
  template<floating_point T> inline constexpr T log2e_v<T>      = /* see description */;
  template<floating_point T> inline constexpr T log10e_v<T>     = /* see description */;
  template<floating_point T> inline constexpr T pi_v<T>         = /* see description */;
  template<floating_point T> inline constexpr T inv_pi_v<T>     = /* see description */;
  template<floating_point T> inline constexpr T inv_sqrtpi_v<T> = /* see description */;
  template<floating_point T> inline constexpr T ln2_v<T>        = /* see description */;
  template<floating_point T> inline constexpr T ln10_v<T>       = /* see description */;
  template<floating_point T> inline constexpr T sqrt2_v<T>      = /* see description */;
  template<floating_point T> inline constexpr T sqrt3_v<T>      = /* see description */;
  template<floating_point T> inline constexpr T inv_sqrt3_v<T>  = /* see description */;
  template<floating_point T> inline constexpr T egamma_v<T>     = /* see description */;
  template<floating_point T> inline constexpr T phi_v<T>        = /* see description */;
 
  inline constexpr double e          = e_v<double>;
  inline constexpr double log2e      = log2e_v<double>;
  inline constexpr double log10e     = log10e_v<double>;
  inline constexpr double pi         = pi_v<double>;
  inline constexpr double inv_pi     = inv_pi_v<double>;
  inline constexpr double inv_sqrtpi = inv_sqrtpi_v<double>;
  inline constexpr double ln2        = ln2_v<double>;
  inline constexpr double ln10       = ln10_v<double>;
  inline constexpr double sqrt2      = sqrt2_v<double>;
  inline constexpr double sqrt3      = sqrt3_v<double>;
  inline constexpr double inv_sqrt3  = inv_sqrt3_v<double>;
  inline constexpr double egamma     = egamma_v<double>;
  inline constexpr double phi        = phi_v<double>;
}
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/header/numbers&oldid=163982"