for loop appears to not be running at all

I understand there’s better ways to be doing what I’m doing, but I’m genuinely confused to why the for loop isn’t running at all.

    function intArray(x) {
  let a = x.toString();
  let b = a.split("");
  return b;
}
function digitalRoot(n) {
  var b = intArray(n);
  console.log(b);
  let d = 0;
  for (var i = 0; i > b.length; i++) {
    d += parseInt(b[i]);
    console.log("for loop doing anything?");
  }
  return d;
}
// Desired output (for now):28
let testNumber = 73279;
console.log(digitalRoot(testNumber));