std::numeri...max_exponent(3) C++ Standard Libary std::numeri...max_exponent(3) NAME std::numeric_limits::max_exponent - std::numeric_limits::max_exponent Synopsis static const int max_exponent; (until C++11) static constexpr int max_exponent; (since C++11) The value of std::numeric_limits<T>::max_exponent is the largest posi- tive number n such that \(\scriptsize r^{n-1}\)rn-1 , where r is std::numeric_limits<T>::radix, is a representable finite value of the floating-point type T. Standard specializations T value of std::numeric_lim- its<T>::max_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_MAX_EXP double DBL_MAX_EXP long double LDBL_MAX_EXP Example Demonstrates the relationships of max_exponent, max_exponent10, and max() for the type float: // Run this code #include <iostream> #include <limits> int main() { std::cout << "max() = " << std::numeric_limits<float>::max() << '\n' << "max_exponent10 = " << std::numeric_lim- its<float>::max_exponent10 << '\n' << std::hexfloat << '\n' << "max() = " << std::numeric_limits<float>::max() << '\n' << "max_exponent = " << std::numeric_limits<float>::max_ex- ponent << '\n'; } Output: max() = 3.40282e+38 max_exponent10 = 38 max() = 0x1.fffffep+127 max_exponent = 128 See also min_exponent10 the smallest negative power of ten that is a valid nor- malized [static] floating-point value (public static member constant) min_exponent one more than the smallest negative power of the radix that is a [static] valid normalized 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...max_exponent(3)
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