std::numbers(3cxx)

✨ NAME ✨

std::numbers — the namespace where all the iconic mathematical constants live 💖 no cap. Also yes this is the manual page for std::numbers(3cxx), from the C++ standard library docs corner of the group chat.

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🌸 SYNOPSIS 🌸

Variables

   Variables
       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)

so basically every constant comes in two flavours, bestie: a plain constexpr double with a short name, and a templated <name>_v version where _Tp is whatever type you feel like 👑. Pick ur fighter.

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🦋 Detailed Description 🦋

std::numbers is the namespace for mathematical constants. That's the whole vibe. It's giving "one job, done immaculately" 💅. Detailed description said: namespace for mathematical constants. And honestly? That's it. That's the post. Periodt.

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🎀 Variable Documentation 🎀

Every single one of these is [inline] and [constexpr], so they're compile-time cuties fr fr. Here's the full lineup, no skips:

• template<typename _Tp> _Tp std::numbers::e_v [inline], [constexpr] — e. Euler's number, the main character of exponential growth 🌈.
• template<typename _Tp> _Tp std::numbers::egamma_v [inline], [constexpr] — the Euler-Mascheroni constant. She's mysterious, she's iconic, she never got a closed form 💜.
• template<typename _Tp> _Tp std::numbers::inv_pi_v [inline], [constexpr] — 1/pi. Pi, but flipped. Inverted queen 🫶.
• template<typename _Tp> _Tp std::numbers::inv_sqrt3_v [inline], [constexpr] — 1/sqrt(3). Yeah. That ratio.
• template<typename _Tp> _Tp std::numbers::inv_sqrtpi_v [inline], [constexpr] — 1/sqrt(pi). Bestie she's the normal-distribution constant, lowkey famous 👑.
• template<typename _Tp> _Tp std::numbers::ln10_v [inline], [constexpr] — log_e 10. Natural log of ten, slaying as always.
• template<typename _Tp> _Tp std::numbers::ln2_v [inline], [constexpr] — log_e 2. Her little sister, equally booked and busy.
• template<typename _Tp> _Tp std::numbers::log10e_v [inline], [constexpr] — log_10 e. Base-ten, base-queen ✨.
• template<typename _Tp> _Tp std::numbers::log2e_v [inline], [constexpr] — log_2 e. Binary baddie 🦋.
• template<typename _Tp> _Tp std::numbers::phi_v [inline], [constexpr] — the golden ratio, (1+sqrt(5))/2. Aesthetically perfect, obviously. Ate and left no crumbs 💅.
• template<typename _Tp> _Tp std::numbers::pi_v [inline], [constexpr] — pi. The blueprint. The blueprint of blueprints. The moment 🥧.
• template<typename _Tp> _Tp std::numbers::sqrt2_v [inline], [constexpr] — sqrt(2). First irrational number to ever be discovered and she has been booked ever since 😭.
• template<typename _Tp> _Tp std::numbers::sqrt3_v [inline], [constexpr] — sqrt(3). Hexagon girlie, geometry icon 🌸.

Reminder bestie: they're all template<typename _Tp> variables marked [inline] and [constexpr], so _Tp is a type parameter and you get to pick the float type you want. Copy the names exactly, don't be out here inventing new ones 🙈.

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💀 Author 💀

Generated automatically by Doxygen for libstdc++ from the source code. Like, nobody hand-wrote this, it's a Doxygen robot and it deserves its flowers too 🎀.

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🫶 Sign-off 🫶

And that's the whole page, bestie!! This whole thing came to you courtesy of libstdc++, and yes the man page is literally called std::numbers(3cxx) — section 3cxx and all. mwah 💖✨