The std::numeric_limits<T> is a class template that enables developers to query property of numeric types. Actual values are available through specializations, and the standard library provides specializations for all the built-in numeric types (char, short, int, long, float, double, and so on). In addition, third parties may provide additional implementation for other types. An example could be a numeric library that implements a bigint integer type and a decimal type and provides specializations of numeric_limits for these types (such as numeric_limits<bigint> and numeric_limits<decimal>).
The following specializations of numeric types are available in the <limits> header. Note that specializations for char16_t and char32_t ...
