Review JavaScript Fundamentals by Building a Gradebook App - Step 1

JavaScript
1

Tell us what’s happening:

Am confused, how can l complete the getAverage function which takes in an array of test scores and returns the average score?

Your code so far


// User Editable Region

function getAverage(scores) {

}

console.log(getAverage([92, 88, 12, 77, 57, 100, 67, 38, 97, 89]));
console.log(getAverage([45, 87, 98, 100, 86, 94, 67, 88, 94, 95]));

// User Editable Region

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0

Challenge Information:

Review JavaScript Fundamentals by Building a Gradebook App - Step 1

2

what have you tried so far? the instructions give you various tips from which you can start

3

yeah, the tips are just confusing me

4

Do you know how to manually calculate the average of a set of numbers?

5

yes l do, sum the scores then divide by the total number of scores

6

let’s start from summing the scores, you have an array, you need to sum all the elements in the array to each other.
How could you do that?

7

am still confused, do l just go on and sum up the array of the first scores in the getAverage function body?

8

You use the scores parameter to access whatever array the function is called with

9

still not getting, can l have like an illustration of what you are trying to mean?

10

A function is created with parameters, in this case scores, the value of the parameter is determined when the function is called, so

here the value of scores is [92, 88, 12, 77, 57, 100, 67, 38, 97, 89]

11

Am defeated, l have tried several times but l’ve failed. l need help with everything or step

12

show your code, it’s the best way to get help

13

Tell us what’s happening:

How can l complete the getAverage function which takes in an array of test scores and returns the average score?

Your code so far


// User Editable Region

function getAverage(scores) {
  let sum = 0;
  for (let i = 0; i < scores.length; i++) {sum += scores[i];}
}

console.log(getAverage([92, 88, 12, 77, 57, 100, 67, 38, 97, 89]));
console.log(getAverage([45, 87, 98, 100, 86, 94, 67, 88, 94, 95]));

// User Editable Region

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0

Challenge Information:

Review JavaScript Fundamentals by Building a Gradebook App - Step 1

14

l have posted a new chat to show the code so far

15

what issue are you having? it looks like you are summing the values inside scores correctly

now you need to finish calculating the average and write the return statement

16

Can you illustrate how am to calculate the average and write the return statement?

17

You got the sum.

Now return sum divided by (numbers of elements in scores array).

How to count numbers of elements in scores array?

18

you said yourself that the average is the sum divided the number of items. You can easily get the number of items, it is a property of arrays

19

thanks guys, it has passed, l really appreciate your help

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