std::numeri...min_exponent(3) C++ Standard Libary std::numeri...min_exponent(3) NAME std::numeric_limits::min_exponent - std::numeric_limits::min_exponent Synopsis static const int min_exponent; (until C++11) static constexpr int min_exponent; (since C++11) The value of std::numeric_limits<T>::min_exponent is the lowest negative number n such that \(\scriptsize r^{n-1}\)rn-1 , where r is std::numeric_limits<T>::radix, is a valid normalized value of the floating-point type T. Standard specializations T value of std::numeric_lim- its<T>::min_exponent /* 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_EXP double DBL_MIN_EXP long double LDBL_MIN_EXP Example Demonstrates the relationships of min_exponent, min_exponent10, min(), and radix for the type float: // Run this code #include <iostream> #include <limits> int main() { std::cout << "min() = " << std::numeric_limits<float>::min() << '\n' << "min_exponent10 = " << std::numeric_lim- its<float>::min_exponent10 << '\n' << std::hexfloat << '\n' << "min() = " << std::numeric_limits<float>::min() << '\n' << "min_exponent = " << std::numeric_limits<float>::min_ex- ponent << '\n'; } Output: min() = 1.17549e-38 min_exponent10 = -37 min() = 0x1p-126 min_exponent = -125 See also radix the radix or integer base used by the representation of the given [static] type (public static member constant) min_exponent10 the smallest negative power of ten that is a valid nor- malized [static] floating-point value (public static member constant) max_exponent one more than the largest integer power of the radix that is a valid [static] finite floating-point value (public static member constant) max_exponent10 the largest integer power of 10 that is a valid finite floating-point [static] value (public static member constant) http://cppreference.com 2024.06.10 std::numeri...min_exponent(3)
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