Reference FQL API reference String parseLong() string.parseLong() Convert a String to a Long. Signature parseLong() => Number | Null parseLong(radix: Number) => Number | Null Description Converts the calling String to a numeric Long. The calling String isn’t changed. Limitations Leading and trailing whitespace and comma separators result in an error. Exponential notation isn’t allowed. Parameters Parameter Type Required Description radix Number Value between 2 and 36 that represents the radix of the calling String. Default = 10. Return value One of: Type Description Number Long parsed from the calling String. Null Unable to parse calling String. Examples Convert an email address to upper case: "10".parseLong() 10 parseInt() parseNumber()