std::numeri...ts::infinity(3) C++ Standard Libary std::numeri...ts::infinity(3) NAME std::numeric_limits::infinity - std::numeric_limits::infinity Synopsis static T infinity() throw(); (until C++11) static constexpr T infinity() noexcept; (since C++11) Returns the special value "positive infinity", as represented by the floating-point type T. Only meaningful if std::numeric_limits<T>::has_infinity == true. In IEEE 754, the most common binary representation of floating-point numbers, the positive infinity is the value with all bits of the exponent set and all bits of the fraction cleared. Return value T std::numeric_limits<T>::infinity() /* non-specialized */ T() bool false char 0 signed char 0 unsigned char 0 wchar_t 0 char8_t (since C++20) 0 char16_t (since C++11) 0 char32_t (since C++11) 0 short 0 unsigned short 0 int 0 unsigned int 0 long 0 unsigned long 0 long long (since C++11) 0 unsigned long long (since C++11) 0 float HUGE_VALF double HUGE_VAL long double HUGE_VALL Example // Run this code #include <iostream> #include <limits> int main() { double max = std::numeric_limits<double>::max(); double inf = std::numeric_limits<double>::infinity(); if (inf > max) std::cout << inf << " is greater than " << max << '\n'; } Output: inf is greater than 1.79769e+308 See also has_infinity identifies floating-point types that can represent the spe- cial value [static] "positive infinity" (public static member constant) http://cppreference.com 2024.06.10 std::numeri...ts::infinity(3)
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