---
title: "三項演算子"
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duration_minutes: 5
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last_updated: "2026-08-04T14:22:05.000Z"
---

# 三項演算子

三項演算子を使って、IF-ELSE の論理条件をよりシンプルかつ短く記述する方法を学びます。

三項演算子を使って、IF-ELSE で記述する論理条件をシンプルに短く書く方法を学びます。

## 1. 三項演算子

[Video](http://www.youtube.com/watch?v=gF5pwVCrOsk)

**TernaryOperator クラスのコード**

```csharp
using UnityEngine;
using System.Collections;

public class TernaryOperator : MonoBehaviour 
{
    void Start () 
    {
        int health = 10;
        string message;

        // これは、変数 "health" の値に基づいてメッセージを選択する
        // 三項演算子の使用例です。
        message = health > 0 ? "Player is Alive" : "Player is Dead";
    }
}
```