如果或切换？以下哪一个是更简洁、更传统的代码？

Question

我了解到，如果可以使用 switch case，就应该使用它们，因为它们的性能更好。以下哪一个代码片段更常规？有多少行为完全相同的情况仍然适用于 switch 语句？您应该何时开始使用 if 语句？

        Console.Write("Insert a card value: ");
        int value = Int32.Parse(Console.ReadLine());
        string symbol = "";
        switch(value)
        {
            case 1:
            case 2:
            case 3:
            case 4:
            case 5:
            case 6:
            case 7:
            case 9:
            case 10:
                symbol = Convert.ToString(value);
                break;
            case 11:
                symbol = "J";
                break;
            case 12:
                symbol = "Q";
                break;
            case 13:
                symbol = "K";
                break;
            case 14:
                symbol = "A";
                break;
        }
        Console.WriteLine("The " + symbol + " has a value of " + value);

或者这一个？

    Console.Write("Insert a card value: ");
    int value = Int32.Parse(Console.ReadLine());
    string symbol = "";
    if (value <= 10)
        symbol = Convert.ToString(value);
    else if (value == 11)
        symbol = "J";
    else if (value == 12)
        symbol = "Q";
    else if (value == 13)
        symbol = "K";
    else if (value == 14)
        symbol = "A";
    Console.WriteLine("The " + symbol + " has a value of " + value);

Answer 1

从 C#9 开始，有一个新的模式匹配，使开关具有很好的可读性：

string symbol = value switch
{
     >=1 and <=10 => Convert.ToString(value),
     11 => "J",
     12 => "Q",
     13 => "K",
     14 => "A",
     _ => ""
};

在线演示：https://dotnetfiddle.net/tovo7d

如果或切换？以下哪一个是更简洁、更传统的代码？

If or switch? Which of these is a cleaner, more conventional code?

c#

if-statement

switch-statement