# std::numbers Symbol Index

From cppreference.com
< cpp‎ | symbol index

This page tries to list all the symbols that are available from the standard library (numerics library) in the namespace std::numbers. The symbols are written as follows:

- Function names with `()`.
- Templates with `<>`.

##

> `E I L P S`

### E

`e` (since C++20)
`e_v` <> (since C++20)
`egamma` (since C++20)
`egamma_v` <> (since C++20)

### I

`inv_pi` (since C++20)
`inv_pi_v` <> (since C++20)
`inv_sqrt3` (since C++20)
`inv_sqrt3_v` <> (since C++20)
`inv_sqrtpi` (since C++20)
`inv_sqrtpi_v` <> (since C++20)

### L

`ln10` (since C++20)
`ln10_v` <> (since C++20)
`ln2` (since C++20)
`ln2_v` <> (since C++20)
`log10e` (since C++20)
`log10e_v` <> (since C++20)
`log2e` (since C++20)
`log2e_v` <> (since C++20)

### P

`phi` (since C++20)
`phi_v` <> (since C++20)
`pi` (since C++20)
`pi_v` <> (since C++20)

### S

`sqrt2` (since C++20)
`sqrt2_v` <> (since C++20)
`sqrt3` (since C++20)
`sqrt3_v` <> (since C++20)

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