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.
Contents |
[edit] 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 |
| char8_t (since C++20) | 0 |
| 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 |
[edit] 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.
[edit] Example
Demonstrates min(), max(), and lowest() for floating-point types:
Run this code
#include <iostream> #include <limits> #include <string_view> template<typename T> void print_twice(std::string_view type, T value) { std::cout << '\t' << type << ": " << std::defaultfloat << value << " or " << std::hexfloat << value << '\n'; } int main() { // min() std::cout << "std::numeric_limits<T>::min():\n"; print_twice("float", std::numeric_limits<float>::min()); print_twice("double", std::numeric_limits<double>::min()); print_twice("long double", std::numeric_limits<long double>::min()); // lowest() std::cout << "std::numeric_limits<T>::lowest():\n"; print_twice("float", std::numeric_limits<float>::lowest()); print_twice("double", std::numeric_limits<double>::lowest()); print_twice("long double", std::numeric_limits<long double>::lowest()); // max() std::cout << "std::numeric_limits<T>::max():\n"; print_twice("float", std::numeric_limits<float>::max()); print_twice("double", std::numeric_limits<double>::max()); print_twice("long double", std::numeric_limits<long double>::max()); }
Output:
std::numeric_limits<T>::min(): float: 1.17549e-38 or 0x1p-126 double: 2.22507e-308 or 0x1p-1022 long double: 3.3621e-4932 or 0x8p-16385 std::numeric_limits<T>::lowest(): float: -3.40282e+38 or -0x1.fffffep+127 double: -1.79769e+308 or -0x1.fffffffffffffp+1023 long double: -1.18973e+4932 or -0xf.fffffffffffffffp+16380 std::numeric_limits<T>::max(): float: 3.40282e+38 or 0x1.fffffep+127 double: 1.79769e+308 or 0x1.fffffffffffffp+1023 long double: 1.18973e+4932 or 0xf.fffffffffffffffp+16380
[edit] See also
| [static] |
returns the smallest finite value of the given non-floating-point type, or the smallest positive normal value of the given floating-point 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) |
