เงื่อนไขและนิพจน์ switch

using System;

class Program
{
    static void Main()
    {
        int score = 87;
        string grade = score switch
        {
            >= 90 => "A",
            >= 80 => "B",
            >= 70 => "C",
            _ => "Needs practice"
        };
        Console.WriteLine(grade);
    }
}