Stan Math Library  2.15.0
reverse mode automatic differentiation
is_nonpositive_integer.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_FUN_IS_NONPOSITIVE_INTEGER_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_IS_NONPOSITIVE_INTEGER_HPP
3 
4 #include<cmath>
5 
6 namespace stan {
7  namespace math {
8 
15  template<typename T>
16  inline bool is_nonpositive_integer(T x) {
17  return x <= 0.0 && floor(x) == x;
18  }
19 
20  }
21 }
22 
23 #endif
bool is_nonpositive_integer(T x)
Returns true if the input is a nonpositive integer and false otherwise.
fvar< T > floor(const fvar< T > &x)
Definition: floor.hpp:11

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