std::numeric_limits::lowest

 

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std::numeric_limits

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numeric_limits::min_exponent10

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numeric_limits::max_exponent10

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numeric_limits::lowest (C++11)

numeric_limits::max

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numeric_limits::denorm_min

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static constexpr T lowest()		(since C++11)

Returns the lowest finite value representable by the numeric type T, that is, a finite value x such that there is no other finite value y where y < x. This is different from std::numeric_limits<T>::min() for floating-point types. Only meaningful for bounded types.

Return value

T	std::numeric_limits<T>::lowest()
/* non-specialized */	T();
bool	false
char	CHAR_MIN
signed char	SCHAR_MIN
unsigned char	​0​
wchar_t	WCHAR_MIN
char16_t	​0​
char32_t	​0​
short	SHRT_MIN
unsigned short	​0​
int	INT_MIN
unsigned int	​0​
long	LONG_MIN
unsigned long	​0​
long long	LLONG_MIN
unsigned long long	​0​
float	-FLT_MAX
double	-DBL_MAX
long double	-LDBL_MAX

Notes

While it's not true for fundamental C++ floating-poing types, a third-party floating-point type T may exist such that std::numeric_limits<T>::lowest() != -std::numeric_limits<T>::max().

Exceptions

noexcept specification:  

noexcept

  (since C++11)

Example

Demonstrates min, max, and lowest for floating-point types

#include <limits>
#include <iostream>
int main()
{
 
    std::cout << "std::numeric_limits<T>::min():\n"
              << "\tfloat: " << std::numeric_limits<float>::min()
              << " or " << std::hexfloat << std::numeric_limits<float>::min() << '\n'
              << "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::min()
              << " or " << std::hexfloat << std::numeric_limits<double>::min() << '\n';
    std::cout << "std::numeric_limits<T>::lowest():\n"
              << "\tfloat: " << std::defaultfloat << std::numeric_limits<float>::lowest()
              << " or " << std::hexfloat << std::numeric_limits<float>::lowest() << '\n'
              << "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::lowest()
              << " or " << std::hexfloat << std::numeric_limits<double>::lowest() << '\n';
    std::cout << "std::numeric_limits<T>::max():\n"
              << "\tfloat: " << std::defaultfloat << std::numeric_limits<float>::max()
              << " or " << std::hexfloat << std::numeric_limits<float>::max() << '\n'
              << "\tdouble: " << std::defaultfloat << std::numeric_limits<double>::max()
              << " or " << std::hexfloat << std::numeric_limits<double>::max() << '\n';
}

Output:

std::numeric_limits<T>::min():
        float: 1.17549e-38 or 0x1p-126
        double: 2.22507e-308 or 0x1p-1022
std::numeric_limits<T>::lowest():
        float: -3.40282e+38 or -0x1.fffffep+127
        double: -1.79769e+308 or -0x1.fffffffffffffp+1023
std::numeric_limits<T>::max():
        float: 3.40282e+38 or 0x1.fffffep+127
        double: 1.79769e+308 or 0x1.fffffffffffffp+1023

See also

min [static]	returns the smallest finite value of the given type (public static member function)
denorm_min [static]	returns the smallest positive subnormal value of the given floating-point type (public static member function)
max [static]	returns the largest finite value of the given type (public static member function)