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Codex edited this page Oct 11, 2026 · 2 revisions

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比較

使用手冊C# · 實用指南

比較數值的順序並回傳bool。可以為使用者類型聲明運算符。

簡單範例 (Example.cs)

請將此範例另存為 Example.cs,並與本頁其他範例分開執行。

Example.cs:

// PROJECT-EXAMPLE
int count = 3;
System.Console.WriteLine(count > 2);

結果:

True

句法

left < right / left >= right

範例1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        int value = 12;
        Console.WriteLine($"{value < 15}:{value > 5}:{value <= 12}:{value >= 12}");
    }
}

範例2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        decimal balance = 12.5M, price = 8M;
        Console.WriteLine(balance >= price ? "Enough" : "Missing");
    }
}

官方來源:Microsoft學習。

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