std::numeric_limits::max

From cppreference.com


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.


`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

[edit] Exceptions

noexcept specification:


noexcept

(since C++11)

[edit] Example

Demonstrates the use of max() with some fundamental types and some standard library typedefs (the output is system-specific)

#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

[edit] See also


lowest [static] (C++11)	returns the lowest finite value of the given type (public static member function)

min [static]	returns the smallest finite value of the given type (public static member function)

Language
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)

std::numeric_limits::max

Contents

[edit] Return value

[edit] Exceptions

[edit] Example

[edit] See also