# std::numeric_limits<T>::max

From cppreference.com
< cpp‎ | types‎ | numeric limits

Defined in header `<limits>` |  |
static T max() throw(); |  | (until C++11)
static constexpr T max() noexcept; |  | (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
char8_t | UCHAR_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

### 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

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)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/max&oldid=108372"