数值计算函数（numerical calculation function）

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1、数值计算函数（Numericalcalculationfunction）ThenumericalcalculationfunctionofPbfunctionlibraryAuthor:unknownupdatetime:2005-05-18(Abs)Absolutevalueoffunctioncalculation.SyntaxAbs(n)Parametern:anumericvariableorexpressionthatgetstheabsolutevalue.ThereturnedvaluereturnsthesametypeofdataasthedatatypeofN

2、,andreturnstheabsolutevalueofnwhenthefunctionsucceeds.IftheparameternisNULL,theAbs()functionreturnsNULL.--------------------------------------------------------------------------------Ceiling()Functionreturnsthesmallestintegergreaterthann.SyntaxCeiling(n)Parametern:anumericvariableorexpressio

3、nthatreturnsavaluewhosedatatypeisthesameasthedatatypeofn.Whenthefunctionsucceeds,itreturnsthesmallestintegergreaterthann.IftheparameternisNULL,theCeiling()functionreturnsNULL.--------------------------------------------------------------------------------(Cos)Thefunctioncalculatesthecosine,in

4、whichtheparametersaremeasuredinradians.SyntaxCos(n)Argumentn:numericvariableorexpressionreturnedvalueDouble.Whenthefunctionsucceeds,thecosineofthenisreturned.IftheparameternisNULL,theCos()functionreturnsNULL.--------------------------------------------------------------------------------(Exp)

5、ThefunctioncalculatesthenpowerofE.SyntaxExp(n)Parametern:SpecifiesthepowerreturnvalueDouble.Whenthefunctionsucceeds,itreturnstheN-E(approximatelyequalto2.71828).IftheparameternisNULL,theExp()functionreturnsNULL.--------------------------------------------------------------------------------(F

6、act)Functioncalculatesthefactorialofn.SyntaxFact(n)Argumentn:numericvariableorexpressionreturnedvalueDouble.Whenthefunctionsucceeds,thefactorialofthenisreturned.IftheparameternisNULL,theFact()functionreturnsNULL.--------------------------------------------------------------------------------(

7、Int)Functiongetsamaximumintegerlessthanorequalton.SyntaxInt(n)Argumentn:numericvariableorexpressionreturnedvalueInteger.Whenthefunctionsucceeds,itreturnsthelargestintegerlessthanorequalton.Ifthevalueofnistoosmallortoolargetoexceedtherangeofth