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.
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 |
While it's not true for fundamental C++ floating-point types, a third-party floating-point type T may exist such that std::numeric_limits<T>::lowest() != -std::numeric_limits<T>::max().
| (none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
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|
[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) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/cpp/types/numeric_limits/lowest