Question: I hava a list of sings: 

```
var sings = [",",".",":","!","?"]

```

How do I check if a word contains one of these signs and return it?

For example:

```
"But,"

return ","

"Finished."

return "."

"Questions?"

return "?"

```

Answer: 
You could solve that with a regular expression:

```js
function match(input) {
  var regex = /([,\.\:!\?])/;
  var matches = input.match(regex);
  return matches ? matches[0] : false;
}

console.log(match("foo?"));   // "?"
console.log(match("bar."));   // "."
console.log(match("foobar")); // false
```
Here is example function

```
var checkSigns = function(str) {
    var signs = [",",".",":","!","?"];

    for (var i = 0; i < signs.length; i++) {
        if (str.indexOf[signs[i]] !== -1) {
            return signs[i];
        }
    }
};

```