/C++

# std::numeric_limits<T>::min_exponent10

 `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`.

### 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` (C++20) `​0​`
`char16_t` (C++11) `​0​`
`char32_t` (C++11) `​0​`
`short` `​0​`
`unsigned short` `​0​`
`int` `​0​`
`unsigned int` `​0​`
`long` `​0​`
`unsigned long` `​0​`
`long long` (C++11) `​0​`
`unsigned long long` (C++11) `​0​`
`float` `FLT_MIN_10_EXP`
`double` `DBL_MIN_10_EXP`
`long double` `LDBL_MIN_10_EXP`

### Example

Demonstrates the relationships of `min_exponent`, `min_exponent10`, `min`, and `radix` for the type `float`:

```#include <iostream>
int main()
{
std::cout << "min() = " << std::numeric_limits<float>::min() << '\n'
<< "min_exponent10 = " << std::numeric_limits<float>::min_exponent10 << '\n'
<< std::hexfloat
<< "min() = " << std::numeric_limits<float>::min() << '\n'
<< "min_exponent = " << std::numeric_limits<float>::min_exponent << '\n';
}```

Output:

```min() = 1.17549e-38
min_exponent10 = -37
min() = 0x1p-126
min_exponent = -125```