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Tham khảo tài liệu 'programming handbook part 83', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Choices VB.NET C greeting Ilf age 20 What s up greeting age 20 What s up Hello Hello One line doesn t require End If no Else If language VB.NET Then langType verbose Use to put two commands on same line If x 100 And y S Then x 5 y 2 Prefer red If x -f 100 And y .5 Then x 5 y 2 End If if x 100 Si y 5 f1 Mult ip1e st at ament s must in x 5 y 2 be enclosed or to break up any long single command use If henYouHaveAReally longLine And _ itNeedsToBeBrokenlntoZ Lines Then _ UseTheUnderscore charToEreakltUpj If x 5 Then x y Elself x Then x y Elself x 10 Then x - y Else x y End If Must be a primitive data type Select Case color Case black red r 1 Case blue if x 5 x y else if x S x y else if x J.0 x - y else x y J Must be inte ge r switch color case black case red break case blue break or string r Case green Cf i Case Else other 1 End Select other VB.NET Pre-test Loops while c 1C c 1 End While Do Until c 10 c 1 Loop Post-test Loop Do While c 10 c 1 Loop Loops c Pre-test Loops while i 10 i for i 2 i 10 i 2 System.Console.Writ e L ine i Post-test Loop do i while i 10 For c 2 To 10 Step Z System. ConsoJ.e. Write Line c Next Ari ay or collection looping Dim names As String Steven SuOk1 Sarah For Each s As String In names System.Console.WriteLine s Next Array or collection looping string names Steven SuOk Sarah foreach string s m names System.Console.WriteLine s Arrays VB.NET Dim nuns As Inte ge r 1 2. r 3 For i As Inte ge r 0 To nuns.L en gth L Console.WriteLine nuns i Went c int nuns 1 2 3 for int i 0 i nuns.Length i Console.WriteLine nuns i 4 is the index of the last element so it holds 5 elements Dim nenes 4 As String names 0 Steven Throws System.IndexOut 9fRangeExcaption names 5 Sarah S is the size of the array string names new str ing -5 f names ij 11 St even . T li r o w s S y s t e m. I n d e x 0 ut U f P. an g e E x c e p t i o n name s 5 115 ar ah C it c an 1t dynami c al ly resize an ar r ay. Resize the array keeping the existing values Preserve is optional ReDim .
