I am trying to build a function that returns true if a given string, as an argument, is a pronoun.

I figured a good way to do this is to check if it begins with a capital / uppercase letter.

If you know of a better what to tell if something is a pronoun, please let me know.

But, for the checking if the first letter is a capital / upper case letter, how can I do that.

I know `string[0`] would give me the first letter, but what do I compare it to to check if it is any capital / upper case letter in the alphabet?

The code that I have right now is

```
function isPronoun($str){
    $result = false;
    if($str[0]===/*capital letter*/){
        $result=true;
    }
    return $result;
}

```