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 positive 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.
T value of std::numeric_limits<T>::max_exponent /* non-specialized */ â0â bool â0â char â0â signed char â0â unsigned char â0â wchar_t â0â char8_t (since C++20) â0â char16_t (since C++11) â0â char32_t (since C++11) â0â short â0â unsigned short â0â int â0â unsigned int â0â long â0â unsigned long â0â long long (since C++11) â0â unsigned long long (since C++11) â0â float FLT_MAX_EXP double DBL_MAX_EXP long double LDBL_MAX_EXP [edit] Example
Demonstrates the relationships of max_exponent, max_exponent10, and max() for the type float:
Output:
max() = 3.40282e+38 max_exponent10 = 38 max() = 0x1.fffffep+127 max_exponent = 128[edit] See also the smallest negative power of ten that is a valid normalized floating-point value
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