Returning the highest value of an array after inputting 5 numbers

csb00 :

I am creating an array by imputing 5 different scores. Now, I am suppose to return the highest score from that particular array. However, after I am done imputting my last score, I am getting the following message: "Highest score: undefined"

Can someone point out as to why this is occuring and help me out? I am currently learning JS.

var arrScores = [];     //I created an empty array where my scores will be stored.                            

//Here I am creating a loop so that the user can input 5 scores
for (var i = 0; i < 5; i++) {             
  arrScores.push(prompt('Please enter your score ' + (i+1))); 
}
//I created a function thinking I would be able to pull the largest score. 
function highestScore(arr){
    highestScore = Math.max(arrScores)
}
//This is suppose to be the final alert with the highest score. 
alert('Highest score: ' + highestScore.join);     

Frustrated Programmer :

Highest score is a function. first you will need to call it

alert('Highest score: ' + highestScore(arrScores));

And to get the value you will need to return the value from the highestScore function

function highestScore(arrScores){
    highestScore = Math.max(...arrScores)
    return highestScore
}

Shorter method

function highestScore(arrScores){
    return Math.max(...arrScores)
}