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std::gcd(3) C++ Standard Libary std::gcd(3) NAME std::gcd - std::gcd Synopsis Defined in header <numeric> template< class M, class N > (since C++17) constexpr std::common_type_t<M, N> gcd( M m, N n ); Computes the greatest common divisor of the integers m and n. If either M or N is not an integer type, or if either is (possibly cv-qualified) bool, the program is ill-formed. If either |m| or |n| is not representable as a value of type std::common_type_t<M, N>, the behavior is undefined. Parameters m, n - integer values Return value If both m and n are zero, returns zero. Otherwise, returns the greatest common divisor of |m| and |n|. Exceptions Throws no exceptions. Notes Feature-test macro Value Std Feature __cpp_lib_gcd_lcm 201606L (C++17) std::gcd, std::lcm Example // Run this code #include <numeric> int main() { constexpr int p{2 * 2 * 3}; constexpr int q{2 * 3 * 3}; static_assert(2 * 3 == std::gcd(p, q)); static_assert(std::gcd( 6, 10) == 2); static_assert(std::gcd( 6, -10) == 2); static_assert(std::gcd(-6, -10) == 2); static_assert(std::gcd( 24, 0) == 24); static_assert(std::gcd(-24, 0) == 24); } See also lcm computes the least common multiple of two integers (C++17) (function template) http://cppreference.com 2024.06.10 std::gcd(3)
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