There is a rich set of standard functions which can be used in a script.

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

As you can see, some functions/procedure have default parameters. You can call it just like in Delphi: Inc(a); Inc(b, 2);