generate and print a list of every four digit number combination excluding 0 has the first digit. Copy the list to the clipboard with each number on its own line

simple-4-digit-list.js

var combinations = [];
for (var i = 1000; i <= 9999; i++) {
  if (i.toString().charAt(0) !== "0") {
    combinations.push(i);
  }
}
console.log(combinations.join("\n"));

// copy the list to the clipboard
var copyToClipboard = (str) => {
  const el = document.createElement("textarea");
  el.value = str;
  el.setAttribute("readonly", "");
  el.style.position = "absolute";
  el.style.left = "-9999px";
  document.body.appendChild(el);
  el.select();
  document.execCommand("copy");
  document.body.removeChild(el);
};

copyToClipboard(combinations.join("\n"));