for loop appears to not be running at all-CodePudding

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));

CodePudding user response：

Your condition for loop is wrong. It should be "less than" not "greater than" since you start from zero up to the length of your array

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  ) { // <- HERE
    d  = parseInt(b[i]);
    console.log("for loop doing anything?");
  }
  return d;
}
// Desired output (for now):28
let testNumber = 73279;
console.log(digitalRoot(testNumber));

CodePudding user response：

function intArray(x) {
  return x.toString().split("");
}

function digitalRoot(n) {
  var b = intArray(n);
  let d = 0;
  
  for (var i = 0; i < b.length; i  ) {
    d  = parseInt(b[i]);
  }
  return d;
}

// Desired output (for now):28
let testNumber = 73279;
console.log(digitalRoot(testNumber));