Determine the length of a String

Return the amount of character in the given string.

Sample Code:

function letterCount(str) {
// Enter your logic here...
}

Examples:

Input: 'Codetisan'
Output: 9
Explanation: There are 9 characters to be found.

Input: ' Java Javascript '
Output: 17
Explanation: 17 characters to be found. Yes, including the spaces.