std::numeric_limits::min_exponent10 - cppreference.com (original) (raw)
| static const int min_exponent10; | | (until C++11) | | ------------------------------------- | | ------------- | | static constexpr int min_exponent10; | | (since C++11) |
The value of std::numeric_limits<T>::min_exponent10 is the lowest negative number n such that \(\scriptsize 10^n\)10n
is a valid normalized value of the floating-point type T.
[edit] Standard specializations
| T | value of std::numeric_limits<T>::min_exponent10 |
|---|---|
| /* non-specialized */ | 0 |
| bool | 0 |
| char | 0 |
| signed char | 0 |
| unsigned char | 0 |
| wchar_t | 0 |
| char8_t (since C++20) | 0 |
| char16_t (since C++11) | 0 |
| char32_t (since C++11) | 0 |
| short | 0 |
| unsigned short | 0 |
| int | 0 |
| unsigned int | 0 |
| long | 0 |
| unsigned long | 0 |
| long long (since C++11) | 0 |
| unsigned long long (since C++11) | 0 |
| float | FLT_MIN_10_EXP |
| double | DBL_MIN_10_EXP |
| long double | LDBL_MIN_10_EXP |
[edit] Example
Demonstrates the relationships of min_exponent, min_exponent10, min(), and radix for the type float:
Output:
min() = 1.17549e-38 min_exponent10 = -37 min() = 0x1p-126 min_exponent = -125
[edit] See also
| | one more than the smallest negative power of the radix that is a valid normalized floating-point value (public static member constant) [edit] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | one more than the largest integer power of the radix that is a valid finite floating-point value (public static member constant) [edit] | | | the largest integer power of 10 that is a valid finite floating-point value (public static member constant) [edit] |