IsPositive A 4-line package motivated by JuliaLang/julia#35067 ispositive(x) = !isnonnegative(x) isnegative(x) = signbit(x) && !iszero(x) isnonnegative(x) = signbit(x) || iszero(x) isnonpositive(x) = !signbit(x) || iszero(x)