JSFiddle - React, Tailwind, and code Playground

by Lazaro Contreras

JavaScript

function findEvenIndex(arr)
{
  var r = 0;
  var s = 0;
  arr.forEach(function(i)
  {
  r = i;
  while (r > 0){
  r--;
  s += arr[r];
  console.log(s);
  }
  if (s == 3)
  {
  r = 3;
  return r;
  }
  s = 0;
  });
  return r;
}
console.log(findEvenIndex([1,2,3,4,3,2,1]),3, "The array was: [1,2,3,4,3,2,1] \n");