html use js variable as text

1
2<h1>"My number: " <span id="myText"></span></h1>
3
4<script>
5
6	//You can use an IIFE (Immediately Invoked Function Expression)
7	(() => {
8  		var number = "123";
9		document.getElementById("myText").innerHTML = number;
10	})();
11</script>