29 Numerics library [numerics]

29.8 Generalized numeric operations [numeric.ops]

29.8.14 Least common multiple [numeric.ops.lcm]

template<class M, class N> constexpr common_type_t<M,N> lcm(M m, N n);
Requires: |m| and |n| shall be representable as a value of common_­type_­t<M, N>.
The least common multiple of |m| and |n| shall be representable as a value of type common_­type_­t<M,N>.
Remarks: If either M or N is not an integer type, or if either is cv bool the program is ill-formed.
Returns: Zero when either m or n is zero.
Otherwise, returns the least common multiple of |m| and |n|.
Throws: Nothing.