How to save a value in player prefs? Var. (java)

So I'm trying to make a high score. I have this as my script (java): static var CurrentScore : int; var InternalScore : int;

 var ScoreText : GameObject;
 
 function Update () {
 
 
     InternalScore = CurrentScore;
     ScoreText.GetComponent.<Text>().text = "" + InternalScore;
 }

and basically what needs to be done, I have to save the data from the (I think internal score? or current score, not sure yet) to player prefs and then also, create a new script/text area for the highscore. It would have to load the saved player pref score AND display the highest number one (highest score // high score). No idea how but any help does help much. Thanks!