Error CS1729 Problem

I was working on unity and when I clicked play to check the idle animation for the player prefab to loop and pressed play and an error pops up saying "error CS1729: The type UnityEngine.Vector3' does not contain a constructor that takes '1' arguments" if anyone has a solution to this problem please give me an answer movement = new Vector3 ("moveHorizontal, 0.0f, moveVertical"); Thanks!