std::numbers(3)

📦
version 13.3.1 · 2 versions
, in centos-stream 9

💖 std::numbers(3) 💖

okay bestie, come closer — this is the std::numbers page from the Library Functions Manual and it's literally just a whole namespace of mathematical constants and the way I'm obsessed?? ✨ no cap.

🌸 NAME 🌸

std::numbers — the namespace for mathematical constants, periodt.

✨ SYNOPSIS ✨

🎀 Variables

so here's the whole squad, one constexpr double plus its templated _v bestie for each one:

constexpr double e
template<typename _Tp > constexpr _Tp e_v
    e
constexpr double egamma
template<typename _Tp > constexpr _Tp egamma_v
    The Euler-Mascheroni constant.
constexpr double inv_pi
template<typename _Tp > constexpr _Tp inv_pi_v
    1/pi
constexpr double inv_sqrt3
template<typename _Tp > constexpr _Tp inv_sqrt3_v
    1/sqrt(3)
constexpr double inv_sqrtpi
template<typename _Tp > constexpr _Tp inv_sqrtpi_v
    1/sqrt(pi)
constexpr double ln10
template<typename _Tp > constexpr _Tp ln10_v
    log_e 10
constexpr double ln2
template<typename _Tp > constexpr _Tp ln2_v
    log_e 2
constexpr double log10e
template<typename _Tp > constexpr _Tp log10e_v
    log_10 e
constexpr double log2e
template<typename _Tp > constexpr _Tp log2e_v
    log_2 e
constexpr double phi
template<typename _Tp > constexpr _Tp phi_v
    The golden ratio, (1+sqrt(5))/2.
constexpr double pi
template<typename _Tp > constexpr _Tp pi_v
    pi
constexpr double sqrt2
template<typename _Tp > constexpr _Tp sqrt2_v
    sqrt(2)
constexpr double sqrt3
template<typename _Tp > constexpr _Tp sqrt3_v
    sqrt(3)

like, every constant gets a _v version where you can pick your _Tp ✨ it's giving "have it your way" 💅

🦋 Detailed Description 🦋

Namespace for mathematical constants. that's it, that's the whole vibe check — it's a namespace, it holds math constants, it slays 🫶

👑 Variable Documentation 👑

each one of these is tagged [inline] and [constexpr], iykyk 💜

  • template<typename _Tp > constexpr _Tp std::numbers::e_v [inline], [constexpr] — e 💖
  • template<typename _Tp > constexpr _Tp std::numbers::egamma_v [inline], [constexpr] — The Euler-Mascheroni constant. the icon herself 😭
  • template<typename _Tp > constexpr _Tp std::numbers::inv_pi_v [inline], [constexpr] — 1/pi 🌸
  • template<typename _Tp > constexpr _Tp std::numbers::inv_sqrt3_v [inline], [constexpr] — 1/sqrt(3) ⭐
  • template<typename _Tp > constexpr _Tp std::numbers::inv_sqrtpi_v [inline], [constexpr] — 1/sqrt(pi) 🧚
  • template<typename _Tp > constexpr _Tp std::numbers::ln10_v [inline], [constexpr] — log_e 10 🍓
  • template<typename _Tp > constexpr _Tp std::numbers::ln2_v [inline], [constexpr] — log_e 2 🌈
  • template<typename _Tp > constexpr _Tp std::numbers::log10e_v [inline], [constexpr] — log_10 e 🔥
  • template<typename _Tp > constexpr _Tp std::numbers::log2e_v [inline], [constexpr] — log_2 e ⭐
  • template<typename _Tp > constexpr _Tp std::numbers::phi_v [inline], [constexpr] — The golden ratio, (1+sqrt(5))/2. main character energy fr fr 👑
  • template<typename _Tp > constexpr _Tp std::numbers::pi_v [inline], [constexpr] — pi 💜
  • template<typename _Tp > constexpr _Tp std::numbers::sqrt2_v [inline], [constexpr] — sqrt(2) 🦋
  • template<typename _Tp > constexpr _Tp std::numbers::sqrt3_v [inline], [constexpr] — sqrt(3) ✨
ngl bestie, the _v ones are the ones documented in detail here — the plain constexpr double versions show up in the synopsis up top, don't forget about them 🙈

💅 Author 💅

Generated automatically by Doxygen for libstdc++ from the source code. not me being autogenerated by a doc tool 😭 iconic behaviour honestly.

and that's the page!! this came out of libstdc++, dated Fri Feb 14 2025 — happy valentine's day from the standard library I guess 💖🎀🫶 see u in the next one, bestie! 🌟

📦 where this page comes from