std::numeric_limits::max(3)

NAME
std::numeric_limits::max - std::numeric_limits::max

Synopsis
   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 (C++20) UCHAR_MAX
   char16_t (C++11) UINT_LEAST16_MAX
   char32_t (C++11) 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 (C++11) LLONG_MAX
   unsigned long long (C++11) 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';
 }

Possible output:
 short: 32767 or 0x7fff
 int: 2147483647 or 0x7fffffff
 streamsize: 9223372036854775807 or 0x7fffffffffffffff
 size_t: 18446744073709551615 or 0xffffffffffffffff
 float: 3.40282e+38 or 0x1.fffffep+127
 double: 1.79769e+308 or 0x1.fffffffffffffp+1023

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