std::numeric_limits<T>::lowest
From cppreference.com
< cpp | types | numeric limits
| static constexpr T lowest() noexcept; |
(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 */ (C++11) | T() |
| bool (C++11) | false |
| char (C++11) | CHAR_MIN |
| signed char (C++11) | SCHAR_MIN |
| unsigned char (C++11) | 0 |
| wchar_t (C++11) | WCHAR_MIN |
| char8_t (C++20) | 0 |
| char16_t (C++11) | 0 |
| char32_t (C++11) | 0 |
| short (C++11) | SHRT_MIN |
| unsigned short (C++11) | 0 |
| int (C++11) | INT_MIN |
| unsigned int (C++11) | 0 |
| long (C++11) | LONG_MIN |
| unsigned long (C++11) | 0 |
| long long (C++11) | LLONG_MIN |
| unsigned long long (C++11) | 0 |
| float (C++11) | -FLT_MAX |
| double (C++11) | -DBL_MAX |
| long double (C++11) | -LDBL_MAX |
Notes
For every standard C++ floating-point type T std::numeric_limits<T>::lowest() == -std::numeric_limits<T>::max(), but this does not necessarily have to be the case for any third-party specialization.
Example
Demonstrates min, max, and lowest for floating-point types
Run this code
#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+1023See also
| [static] |
returns the smallest finite value of the given type (public static member function) |
| [static] |
returns the smallest positive subnormal value of the given floating-point type (public static member function) |
| [static] |
returns the largest finite value of the given type (public static member function) |