Reference FQL API reference String at() string.at() Get the character at a specified index of a String. Signature at(index: Number) => String Description Returns the UTF-16 character located at a zero-based offset index. The calling String isn’t changed. Parameters Parameter Type Required Description index Int true Zero-based index of the character to return. Must be less than the String's length. Return value Type Description String Character located at the specified index. Examples Return the character at index offset 9: "HTTP/1.1 200 OK".at(9) "2" string.length casefold()