how to get array index foreach in javascript code example

Example 1: foreach loop javascript

const numList = [1, 2, 3];

numList.forEach((number) => {
  console.log(number);
});

Example 2: javascript foreach call specific value in array

run.addEventListener("click", function () {
    people.forEach((element) => console.log(element.firstname));
  }); // select a specific string in array