Doing it a bit non-beginner like I guess

[Vegaaaa]

public class NumberWizard : MonoBehaviour {
    // definition
    static int max = 1000;
    static int min = 1;
    static int guess = (min + max) / 2;
    const string HIGHER = "higher";
    const string LOWER = "lower";
   
    // Use this for initialization
    void Start () {
        Debug.Log("Welcome to number wizard");
        Debug.Log("Pick a number between " + min + " and " + max + " :");
        Debug.Log("Tell me if your number is higher or lower than " + guess);
        Debug.Log("Push Up = higher, Push Down = Lower, Push Enter = Correct");
        max++;
	}
	
	// Update is called once per frame
	void Update () {
        if (Input.GetKeyDown(KeyCode.UpArrow)) {
            min = guess;
            PrintResult(HIGHER);
        } else if (Input.GetKeyDown(KeyCode.DownArrow)) {
            max = guess;
            PrintResult(LOWER);
        } else if (Input.GetKeyDown(KeyCode.Return)) {
            Debug.Log("Your guess was: " + guess + "!");
        }
	}

    void PrintResult(string higherOrLower) {
        guess = (min + max) / 2;
        Debug.Log("Your guess was " + higherOrLower);
        Debug.Log("Tell me if your number is higher or lower than " + guess);
        Debug.Log("Push Up = higher, Push Down = Lower, Push Enter = Correct");
    }
}