Retrieves the character at the nth position.
Returns the grapheme at the position of the given UTF-8 string. If position is greater than string length, then it returns nil.
- string: Location of the string to retrieve the character from
- at: Position of the character to retrieve (Position starts from 0)
- output-location: Location to store the output data
Retrieving character from position 3 of string ‘Interactor’ would return ‘r’