Explain the need of built-in functions in Visual Basic List out the various built in functions that are available in the latest version?

Answer 1

The built in functions provided by Visual Basic offers a rich set of tools/short-cuts for manipulating strings, numbers, dates and time. Built in functions are important and useful as they cut down the effort and time, of writing the entire program all over again and again. Besides VB supports many mathematical or numeric functions that can make calculations very simple, as one just have to feed in the variables , and get the output after the function processes it. The various built in functions that are available in the latest version (VB-6) are: * Math Functions-Abs(vNumber), Atn(vNumber), Cos(vNumber), Exp(vPower) ,Hex(vNumber), Int(vNumber), Fix(vNumber), Log(vNumber), Oct(vNumber), Rnd(), Sgn(vNumber), Sin(vNumber), Sqr(vNumber), Tan(vNumber). * Conversion Functions-CBool(vVariant), Cbyte(vVariant), Ccur(vVariant), Cdate(vVariant), Cdbl(vVariant), Cint(vVariant), Clng(vVariant), Csng(vVariant), Cstr(vVariant). * String Functions--InStr(sString, sSubString), InStrRev(sString, sSubString), Lcase(sString), Left(sString, iLen), Len(sString), Ltrim(sString), Rtrim(sString), Trim(sString), Mid(sString, iStart, iLen), Replace(sString, sOld, sNew), Right(sString), Space(iLen), StrComp(sString1, sString2), String(iLen, sChar, iLen), StrReverse(sString), Ucase(sString), Asc(sString), Chr(iInteger) * Date and Time Functions-CDate(vVariant), Date(), DateAdd(sType, iInterval, tDate), DateDiff(tDate1, tDate2), DatePart(sType, tDate), DateSerial(iYear, iMonth, iDate), DateValue(vVariant), Day(tDate), FormatDateTime(tDate, iType), Hour(tDate), IsDate(vVariant), Minute(tDate), Month(tDate), MonthName(iMonth), Now(), Second(tDate0, Timer(), TimeSerial(iHour, iMinute, iSecond), TimeValue(tDate), Weekday(tDate), WeekdayName(iWeekDay), Year(tDate) * Array Functions--Array(vArg1, vArg2, …), IsArray(vVariant), Join(aArray), Lbound(aArray), Split(sString, sDelimiter), Ubound(aArray). * Misc. Functions-IsArray(variable), IsDate(variable), IsEmpty(variable), IsNull(variable), IsNumeric(variable), IsObject(variable), TypeName(variable), VarType(vVariant).