🧠 If This, Then That – Writing Decisions in Code

• Want your game to say “You Win!” when score hits 100?
• Or make the player jump only when they’re on the ground?
• Time to learn conditional logic - the magical power of if and else.

🤔 What is a Conditional Statement?

A conditional lets your code ask a question, and do something based on the answer.

Example:

1if (score >= 100)2{3    Debug.Log("You win!");4}

• This checks if score is greater than or equal to 100.
• If it is - boom, message appears. If not - nothing happens (yet).

🧰 Common Comparison Operators

🔀 Using else and else if

Basic else :

1if (health

Chaining with else if :

1if (score >= 100)2{3    Debug.Log("Gold Medal!");4}5else if (score >= 50)6{7    Debug.Log("Silver Medal!");8}9else10{11    Debug.Log("Try Again!");12}

This allows multiple conditions - great for scoring, levels, and enemy behavior.

🧪 Unity Example: Player Health

1using UnityEngine;2 3public class HealthCheck : MonoBehaviour4{5    public int health = 100;6 7    void Start()8    {9        if (health

Try changing the health value in the Inspector and see what message you get when you hit Play.

🔄 Combine with Variables and Methods

Conditional logic becomes powerful when mixed with other tools:

1void TakeDamage(int damage)2{3    health -= damage;4 5    if (health

Suddenly your game has life and death stakes!

🧠 Recap

• if checks a condition and runs code only if it’s true
• Use else to do something if the condition is false
• else if adds more options to your logic tree
• Great for score checks, game over logic, power-ups, and more

🧪 Mini Challenge: Damage Logic

1. Create a script called EnemyHealth.cs
2. Add a public int health = 50;
3. Add a method TakeHit(int damage)
4. Inside, check if health is 0 or below If yes → print "Enemy defeated!"
5. If no → print "Enemy still standing"

Then call it with a few values and test different outcomes.

🚀 What’s Next?

Let’s crank up the logic with loops – the ultimate tool for repeating actions like spawning enemies, counting down, or charging attacks.

🔁 Go to Lesson 10 → Loops (for, while) in Unity C#