如何创建一个变量，该变量会自动添加+1

Question

我测试了这段代码，并且可以正常工作，但是我不想知道如何复制和复制很多时间并在下面更改每个时间变量，而是想知道如何转换它以便为：
myInput-> myInput1-> myInput2-> myInput3-> myInput + i
myUL-> myUL1-> myUL2-> myUL3-> myUL + i

我从1开始到无极限

请找到代码测试（）

我希望每个循环都有：myinput + i和myul + i

<script>
// Create a new list item when clicking on the "Add" button
function newElement1() {
  var li = document.createElement("li");
  var inputValue = document.getElementById("myInput1").value;
  var t = document.createTextNode(inputValue);
  li.appendChild(t);
  if (inputValue === '') {
    alert("You must write something!");
  } else {
    document.getElementById("myUL1").appendChild(li);
  }
  document.getElementById("myInput1").value = "";

  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  li.appendChild(span);

  for (i = 0; i < close.length; i++) {
    close[i].onclick = function() {
      var div = this.parentElement;
      div.style.display = "none";
    }
  }
}

function newElement2() {
  var li = document.createElement("li");
  var inputValue = document.getElementById("myInput2").value;
  var t = document.createTextNode(inputValue);
  li.appendChild(t);
  if (inputValue === '') {
    alert("You must write something!");
  } else {
    document.getElementById("myUL2").appendChild(li);
  }
  document.getElementById("myInput2").value = "";

  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  li.appendChild(span);

  for (i = 0; i < close.length; i++) {
    close[i].onclick = function() {
      var div = this.parentElement;
      div.style.display = "none";
    }
  }
}

function newElement3() {
  var li = document.createElement("li");
  var inputValue = document.getElementById("myInput3").value;
  var t = document.createTextNode(inputValue);
  li.appendChild(t);
  if (inputValue === '') {
    alert("You must write something!");
  } else {
    document.getElementById("myUL3").appendChild(li);
  }
  document.getElementById("myInput3").value = "";

  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  li.appendChild(span);

  for (i = 0; i < close.length; i++) {
    close[i].onclick = function() {
      var div = this.parentElement;
      div.style.display = "none";
    }
  }
}
</script>