C# 4 and .NET 4

loops ❘ OC173
}
switch (s)
{
case Suit::Heart:
case Suit::Diamond:
color = "Red";
break;
case Suit::Spade:
case Suit::Club:
color = "Black";
break;
default:
color = "Unknown";
break;
}
return color;
' Visual Basic
Function GetColor(ByVal s As Suit) As String
Dim color As String = Nothing
Select Case s
Case Suit.Heart And Suit.Diamond
color = "Red"
Case Suit.Spade And Suit.Club
color = "Black"
Case Else
color = "Unknown"
End Select
Return color
End Function
// F#
type SuitTest =
static member GetColor(s : Suit) : string =
match s with
| Suit.Heart | Suit.Diamond -> "Red"
| Suit.Spade | Suit.Club -> "Black"
| _ -> "Unknown"
looPs
With loops, code is executed repeatedly until a condition is met. Loops with C# are discussed in Chapter 2,
“Core C# ,” including: for, while, do.while, and foreach. C# and C++/CLI are very similar with regard
to looping statements; Visual Basic and F# defines different statements.
for statement
The for statement is similar with C# and C++/CLI. With Visual Basic, you can’t initialize a variable
inside the for/to statement; you must initialize the variable beforehand. for/to doesn’t require a Step to
follow — Step 1 is the default. Just in case you don’t want to increment by 1, the Step keyword is required
with for/to. F# uses the for/to/do and for/downto/do keywords:
// C#
for (int i = 0; i < 100; i++)
{
Console.WriteLine(i);
}
// C++/CLI
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