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std::numeric_limits::radix

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.

Standard 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`
`char16_t`	`2`
`char32_t`	`2`
`short`	`2`
`unsigned short`	`2`
`int`	`2`
`unsigned int`	`2`
`long`	`2`
`unsigned long`	`2`
`long long`	`2`
`unsigned long long`	`2`
`float`	`FLT_RADIX`
`double`	`FLT_RADIX`
`long double`	`FLT_RADIX`

digits [static]	number of `radix` digits that can be represented without change (public static member constant)
min_exponent [static]	one more than the smallest negative power of the radix that is a valid normalized floating-point value (public static member constant)
max_exponent [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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std::numeric_limits::radix

Standard specializations

See also