std::numeric_limits::max
From cppreference.com
< cpp | types | numeric limits
static T max(); |
(until C++11) | |
static constexpr T max(); |
(since C++11) | |
Returns the maximum finite value representable by the numeric type T
. Meaningful for all bounded types.
Return value
T
|
std::numeric_limits<T>::max() |
/* non-specialized */ | T();
|
bool | true |
char | CHAR_MAX |
signed char | SCHAR_MAX |
unsigned char | UCHAR_MAX |
wchar_t | WCHAR_MAX |
char16_t | UINT_LEAST16_MAX |
char32_t | UINT_LEAST32_MAX |
short | SHRT_MAX |
unsigned short | USHRT_MAX |
int | INT_MAX |
unsigned int | UINT_MAX |
long | LONG_MAX |
unsigned long | ULONG_MAX |
long long | LLONG_MAX |
unsigned long long | ULLONG_MAX |
float | FLT_MAX |
double | DBL_MAX |
long double | LDBL_MAX |
Exceptions
(none) | (until C++11) |
noexcept specification: noexcept |
(since C++11) |
Example
Demonstrates the use of max() with some fundamental types and some standard library typedefs (the output is system-specific)
Run this code
#include <limits> #include <cstddef> #include <iostream> int main() { std::cout << "short: " << std::dec << std::numeric_limits<short>::max() << " or " << std::hex << std::showbase << std::numeric_limits<short>::max() << '\n' << "int: " << std::dec << std::numeric_limits<int>::max() << " or " << std::hex << std::numeric_limits<int>::max() << '\n' << std::dec << "streamsize: " << std::dec << std::numeric_limits<std::streamsize>::max() << " or " << std::hex << std::numeric_limits<std::streamsize>::max() << '\n' << "size_t: " << std::dec << std::numeric_limits<std::size_t>::max() << " or " << std::hex << std::numeric_limits<std::size_t>::max() << '\n' << "float: " << std::numeric_limits<float>::max() << " or " << std::hexfloat << std::numeric_limits<float>::max() << '\n' << "double: " << std::defaultfloat << std::numeric_limits<double>::max() << " or " << std::hexfloat << std::numeric_limits<double>::max() << '\n'; }
Output:
short: 32767 or 0x7fff int: 2147483647 or 0x7fffffff size_t: 18446744073709551615 or 0xffffffffffffffff streamsize: 9223372036854775807 or 0x7fffffffffffffff float: 3.40282e+38 or 0x1.fffffep+127 double: 1.79769e+308 or 0x1.fffffffffffffp+1023
See also
[static] (C++11) |
returns the lowest finite value of the given type (public static member function) |
[static] |
returns the smallest finite value of the given type (public static member function) |