static const int radix; | (until C++11) | |

static constexpr int radix; | (since C++11) |

The value of `std::numeric_limits<T>::radix`

is the base of the number system used in the representation of the type. It is 2 for all binary numeric types, but it may be, for example, 10 for IEEE 754 decimal floating-point types or for third-party binary-coded decimal integers. This constant is meaningful for all specializations.

`T` | value of `std::numeric_limits<T>::radix` |
---|---|

/* non-specialized */ | `0` |

`bool` | `2` |

`char` | `2` |

`signed char` | `2` |

`unsigned char` | `2` |

`wchar_t` | `2` |

`char8_t` (C++20) | `2` |

`char16_t` (C++11) | `2` |

`char32_t` (C++11) | `2` |

`short` | `2` |

`unsigned short` | `2` |

`int` | `2` |

`unsigned int` | `2` |

`long` | `2` |

`unsigned long` | `2` |

`long long` (C++11) | `2` |

`unsigned long long` (C++11) | `2` |

`float` | `FLT_RADIX` |

`double` | `FLT_RADIX` |

`long double` | `FLT_RADIX` |

[static] | number of `radix` digits that can be represented without change (public static member constant) |

[static] | one more than the smallest negative power of the radix that is a valid normalized floating-point value (public static member constant) |

[static] | one more than the largest integer power of the radix that is a valid finite floating-point value (public static member constant) |

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