[Overview][Constants][Types][Classes][Procedures and functions][Variables] | Reference for unit 'Classes' (#fcl)

# TStringList.Add

Implements the TStrings.Add function.

## Declaration

`public function TStringList.Add(`
`const S: String`
`):Integer; override;`

## Description

Add will add S to the list. If the list is sorted and the string S is already present in the list and TStringList.Duplicates is dupError then an EStringListError exception is raised. If Duplicates is set to dupIgnore then the return value is underfined.

If the list is sorted, new strings will not necessarily be added to the end of the list, rather they will be inserted at their alphabetical position.

## Errors

If the list is sorted and the string S is already present in the list and TStringList.Duplicates is dupError then an EStringListError exception is raised.

## See also

TStringList.Insert |  | Overrides the TStrings.Insert method.
TStringList.Duplicates |  | Describes the behaviour of a sorted list with respect to duplicate strings.