Preview:
// 1: .toString
function numberToString(num) {
  return num.toString();
}

// 2: String()
function numberToString(num) {
  return String(num);
}

// 3: '' +
function numberToString(num) {
  return ''+num;
}
downloadDownload PNG downloadDownload JPEG downloadDownload SVG

Tip: You can change the style, width & colours of the snippet with the inspect tool before clicking Download!

Click to optimize width for Twitter