Please help me in understanding the undefined result

Question

There have been a ton of conceptual answers, but could someone break it down into a simple resolution?

function main() {
var exam1 = parseInt(readLine(), 10);
var exam2 = parseInt(readLine(), 10);
var exam3 = parseInt(readLine(), 10);

Exams.average(exam1,exam2,exam3);

}
class Exams{
//your code goes here
constructor(e1,e2,e3){
this.e1 = e1;
this.e2 = e2;
this.e3 = e3;
}

static average(e1,e2,e3){
const avg = (e1+e2+e3)/3;
return Math.round(avg);
}
}

const avg = new Exams()

console.log(Exams.average());

Answer 1

// here's the correct code
function main() {
var exam1 = 56;
var exam2 = 65;
var exam3 = 87;

console.log("The average is", Exams.average(exam1,exam2,exam3));

}

class Exams{
//your code goes here
constructor(e1,e2,e3){
this.e1 = e1;
this.e2 = e2;
this.e3 = e3;
}

static average(e1,e2,e3){
const avg = (e1+e2+e3)/3;
return Math.round(avg);
}
}

const avg = new Exams()
main()

Answer 2

S C Lee I'm batting a 1000 today(not really)
I made a mistake in my earlier post. You don't need to invoke main() just remove it and you code will work.

Answer 3

that created an input alert box?
That did not help.

Answer 4

Placing values in the code doesn't call the random values of the test cases

Didn't work without them. Any other suggestions?

Answer 5

Why dies it not call the random values (exam scores) from the main?

Answer 6

Sorry about leaving you hi and dry yesterday.

You need to call the function main(), get rid of the last two lines at end of your code
"const avg = new Exams()

console.log(Exams.average());"

and add main()

Answer 7

my latest effort returned NaN

function main() {
var exam1 = parseInt(readLine(), 10);
var exam2 = parseInt(readLine(), 10);
var exam3 = parseInt(readLine(), 10);

console.log("average is", Exams.average(exam1,exam2,exam3));
}
class Exams{
//your code goes here
constructor(e1,e2,e3){
this.e1 = e1;
this.e2 = e2;
this.e3 = e3;
}

static average(e1,e2,e3){
const avg = (e1 + e2 + e3)/3;
return Math.round(avg);
}
}

main()

Answer 8

ODLNT thank you for clearing that up. Still a bit foggy on why it got there, but let's take the win!