What is the difference between // and /* ?

[ffs]

When wanting to make a note in the coding about what a particular script etc does, I've seen both /*....*/ and //.... used, where ... refers to the description/effect - is there a difference between the two styles making one preferable to the other?

[elli]

These are JavaScript comments. Both are valid, it's just that one typically represents single-line comments (//) and the other represents multi-line comments (/* */).

Like this:

<script>
// This is a single-line comment
function hello() {
 alert("Hello there!");
}
</script>

<script>
/*
This is a multi-line comment.
Anything within these characters won't be executed
*/
function hello() {
 alert("Hello there!");
}
</script>

www.w3schools.com/js/js_comments.asp

[ffs]

Thanks for that, elli.