The program provides rich set of standard functions which can be used in
a script. To get an access to these functions, pass the fsGlobalUnit
reference to the TfsScript.Parent property.

function IntToStr(i: Integer): String 
function FloatToStr(e: Extended): String 
function DateToStr(e: Extended): String 
function TimeToStr(e: Extended): String 
function DateTimeToStr(e: Extended): String 
function VarToStr(v: Variant): String

function StrToInt(s: String): Integer 
function StrToFloat(s: String): Extended 
function StrToDate(s: String): Extended 
function StrToTime(s: String): Extended 
function StrToDateTime(s: String): Extended

function Format(Fmt: String; Args: array): String 
function FormatFloat(Fmt: String; Value: Extended): String 
function FormatDateTime(Fmt: String; DateTime: TDateTime): String 
function FormatMaskText(EditMask: string; Value: string): string

function EncodeDate(Year, Month, Day: Word): TDateTime 
procedure DecodeDate(Date: TDateTime; var Year, Month, Day: Word) 
function EncodeTime(Hour, Min, Sec, MSec: Word): TDateTime 
procedure DecodeTime(Time: TDateTime; var Hour, Min, Sec, MSec: Word) 
function Date: TDateTime function Time: TDateTime 
function Now: TDateTime

function DayOfWeek(aDate: DateTime): Integer 
function IsLeapYear(Year: Word): Boolean 
function DaysInMonth(nYear, nMonth: Integer): Integer

function Length(s: String): Integer

function Copy(s: String; from, count: Integer): String

function Pos(substr, s: String): Integer

procedure Delete(var s: String; from, count: Integer): String 
procedure Insert(s: String; var s2: String; pos: Integer): String 
function Uppercase(s: String): String 
function Lowercase(s: String): String 
function Trim(s: String): String 
function NameCase(s: String): String 
function CompareText(s, s1: String): Integer

function Chr(i: Integer): Char 
function Ord(ch: Char): Integer 
procedure SetLength(var S: String; L: Integer)

function Round(e: Extended): Integer 
function Trunc(e: Extended): Integer 
function Int(e: Extended): Integer 
function Frac(X: Extended): Extended 
function Sqrt(e: Extended): Extended 
function Abs(e: Extended): Extended 
function Sin(e: Extended): Extended 
function Cos(e: Extended): Extended 
function ArcTan(X: Extended): Extended 
function Tan(X: Extended): Extended 
function Exp(X: Extended): Extended 
function Ln(X: Extended): Extended function Pi: Extended

procedure Inc(var i: Integer; incr: Integer = 1) 
procedure Dec(var i: Integer; decr: Integer = 1) 
procedure RaiseException(Param: String) 
procedure ShowMessage(Msg: Variant) 
procedure Randomize function Random: Extended 
function ValidInt(cInt: String): Boolean 
function ValidFloat(cFlt: String): Boolean 
function ValidDate(cDate: String): Boolean 
function CreateOleObject(ClassName: String): Variant 
function VarArrayCreate(Bounds: Array; Typ: Integer): Variant

function IIF(Expr: boolean; TrueValue: Variant; FalseValue: Variant): Variant

As you can see, some of the functions/procedures have default
parameters. You can call them just like you do in Delphi:

Inc(a);
Inc(b,2);