here is how to determine the average value of a random row of numbers. This is a function you can use in many circumstances e.g. to calculate the average value / sqm of land in a certain region.

Part 1: how to determine the sum of the row of numbers and the length of the row

function berekenAantalEnSom(rij) {
const aantalGetallen = rij.length;
const som = rij.reduce((a, b) => a + b);
return { aantalGetallen, som };
}

The function `berekenAantalEnSom` takes an array of numbers as input and returns an object with two properties: `aantalGetallen` and `som`. The `aantalGetallen` property is the number of elements in the input array and the `som` property is the sum of all elements in the input array.

In your example code, this function is defined in JavaScript. It takes an array called `rij` as input and returns an object with two properties: `aantalGetallen` and `som`. The `aantalGetallen` property is the length of the input array and the `som` property is the sum of all elements in the input array.

Here’s how you can use this function:

const rij = [1, 2, 3, 4, 5];
const result = berekenAantalEnSom(rij);
console.log(result); // { aantalGetallen: 5, som: 15 }

Example

Part 2: Average value of the array

To determine the average value of the array, you can modify the `berekenAantalEnSom` function to include an additional property that calculates the average value of the input array. Here’s how you can modify the function:

function berekenAantalEnSom(rij) {
const aantalGetallen = rij.length;
const som = rij.reduce((a, b) => a + b);
const gemiddelde = som / aantalGetallen;
return { aantalGetallen, som, gemiddelde };
}

Now, when you call this function with an array as input, it will return an object with three properties: `aantalGetallen`, `som`, and `gemiddelde`. The `gemiddelde` property is the average value of the input array.

Here’s how you can use this modified function:

const rij = [1, 2, 3, 4, 5];
const result = berekenAantalEnSom(rij);
console.log(result); // { aantalGetallen: 5, som: 15, gemiddelde: 3 }

Further reading

Source: Conversation with Bing, 7/4/2023
(1) Regular Expressions – Python Questions and Answers – Sanfoundry. https://www.sanfoundry.com/python-questions-answers-regular-expressions/.
(2) Neurotransmitters: What They Are, Functions & Types – Cleveland Clinic. https://my.clevelandclinic.org/health/articles/22513-neurotransmitters.
(3) Function | Definition, Types, Examples, & Facts | Britannica. https://www.britannica.com/science/function-mathematics.