Top esse tópico parabéns. Usei alguns exemplo também e voilà deu certo. Segue o teste abaixo:

var lista = [1,2,3,4,5,6,7,8,9,10];
var soma = 0;
for(var i = 0; i < lista.length; i++) {
    soma += lista[i];
}
return soma;

Resultado OpenAI:

This code defines an array called lista containing the numbers from 1 to 10, and a variable soma initialized to 0. It then uses a for loop to iterate over the elements of the lista array and add them to the soma variable. The loop continues until the counter i reaches the length of the lista array.

At the end of the loop, the soma variable will contain the sum of all the elements in the lista array. The function returns this value.

If you were to call this function, it would return the value 55 (which is the sum of all the numbers from 1 to 10).

Outro exemplo com cálculo de média

var lista = [1,2,3,4,5,6,7,8,9,10];
var soma = 0;
for(var i = 0; i < lista.length; i++) {
    soma += lista[i];
}
media = soma/lista.length
return media;

Resultado OpenAI:

This code is similar to the previous example, but it adds an additional step to calculate the average of the values in the lista array.

The soma variable is calculated in the same way as before, by adding up all the values in the lista array using a for loop. Then, the average is calculated by dividing the sum by the length of the array using the arr.length property. Finally, the average is returned by the function.

If you were to call this function, it would return the value 5.5, which is the average of the numbers from 1 to 10.