Standard library header  (C++20) (original) (raw)

This header is part of the numeric library.

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

The header provides several mathematical constants, such as std:🔢:pi or std:🔢:sqrt2

[edit] Synopsis

namespace std::numbers { template inline constexpr T e_v = /* unspecified /; template inline constexpr T log2e_v = / unspecified /; template inline constexpr T log10e_v = / unspecified /; template inline constexpr T pi_v = / unspecified /; template inline constexpr T inv_pi_v = / unspecified /; template inline constexpr T inv_sqrtpi_v = / unspecified /; template inline constexpr T ln2_v = / unspecified /; template inline constexpr T ln10_v = / unspecified /; template inline constexpr T sqrt2_v = / unspecified /; template inline constexpr T sqrt3_v = / unspecified /; template inline constexpr T inv_sqrt3_v = / unspecified /; template inline constexpr T egamma_v = / unspecified /; template inline constexpr T phi_v = / unspecified /;   template inline constexpr T e_v = / see description /; template inline constexpr T log2e_v = / see description /; template inline constexpr T log10e_v = / see description /; template inline constexpr T pi_v = / see description /; template inline constexpr T inv_pi_v = / see description /; template inline constexpr T inv_sqrtpi_v = / see description /; template inline constexpr T ln2_v = / see description /; template inline constexpr T ln10_v = / see description /; template inline constexpr T sqrt2_v = / see description /; template inline constexpr T sqrt3_v = / see description /; template inline constexpr T inv_sqrt3_v = / see description /; template inline constexpr T egamma_v = / see description /; template inline constexpr T phi_v = / see description */;   inline constexpr double e = e_v; inline constexpr double log2e = log2e_v; inline constexpr double log10e = log10e_v; inline constexpr double pi = pi_v; inline constexpr double inv_pi = inv_pi_v; inline constexpr double inv_sqrtpi = inv_sqrtpi_v; inline constexpr double ln2 = ln2_v; inline constexpr double ln10 = ln10_v; inline constexpr double sqrt2 = sqrt2_v; inline constexpr double sqrt3 = sqrt3_v; inline constexpr double inv_sqrt3 = inv_sqrt3_v; inline constexpr double egamma = egamma_v; inline constexpr double phi = phi_v; }