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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../types/numeric_limits/min_exponent.html below:

std::numeric_limits<T>::min_exponent - cppreference.com

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.

[edit] Standard specializations T value of std::numeric_limits<T>::min_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_MIN_EXP double DBL_MIN_EXP long double LDBL_MIN_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 the radix or integer base used by the representation of the given type
(public static member constant) [edit] the smallest negative power of ten 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]

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