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sign.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_FUN_SIGN_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_SIGN_HPP
3
4 namespace stan {
5 namespace math {
6
7 // returns 1 if NaN is passed in.
8 template<typename T>
9 inline int sign(const T& z) {
10 return (z == 0) ? 0 : z < 0 ? -1 : 1;
11 }
12 }
13 }
14
15 #endif
16
stan::math::sign
int sign(const T &z)
Definition: sign.hpp:9

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