std::numeri...mits::digits(3) C++ Standard Libary std::numeri...mits::digits(3) NAME std::numeric_limits::digits - std::numeric_limits::digits Synopsis static const int digits; (until C++11) static constexpr int digits; (since C++11) The value of std::numeric_limits<T>::digits is the number of digits in base-radix that can be represented by the type T without change. For integer types, this is the number of bits not counting the sign bit and the padding bits (if any). For floating-point types, this is the digits of the mantissa (for IEC 559/IEEE 754 implementations, this is the number of digits stored for the mantissa plus one, because the mantissa has an implicit leading 1 and binary point). Standard specializations T value of std::numeric_limits<T>::digits (assuming no padding bits) /* non-specialized */ 0 bool 1 char CHAR_BIT - std::numeric_lim- its<char>::is_signed signed char CHAR_BIT - 1 unsigned char CHAR_BIT CHAR_BIT * sizeof(wchar_t) wchar_t - std::numeric_lim- its<wchar_t>::is_signed char8_t (since C++20) CHAR_BIT char16_t (since C++11) CHAR_BIT * sizeof(char16_t) char32_t (since C++11) CHAR_BIT * sizeof(char32_t) short CHAR_BIT * sizeof(short) - 1 unsigned short CHAR_BIT * sizeof(short) int CHAR_BIT * sizeof(int) - 1 unsigned int CHAR_BIT * sizeof(int) long CHAR_BIT * sizeof(long) - 1 unsigned long CHAR_BIT * sizeof(long) long long (since C++11) CHAR_BIT * sizeof(long long) - 1 unsigned long long (since C++11) CHAR_BIT * sizeof(long long) float FLT_MANT_DIG double DBL_MANT_DIG long double LDBL_MANT_DIG See also radix the radix or integer base used by the representation of the given type [static] (public static member constant) min_exponent one more than the smallest negative power of the radix that is a valid [static] normalized floating-point value (public static member constant) max_exponent one more than the largest integer power of the radix that is a valid [static] finite floating-point value (public static member constant) http://cppreference.com 2024.06.10 std::numeri...mits::digits(3)
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