🔁 Loops – When You Want Something to Happen Again… and Again

• Imagine spawning 5 enemies, checking every platform for coins, or counting down a timer.
• Typing the same code 10 times? Nah.
• That’s what loops are for.

• In this lesson, we’ll cover the two most common types of loops in C#:
• for loops and while loops.

🔄 What is a Loop?

A loop lets you repeat a block of code multiple times.

🎯 for Loop – Counted Repetition

1for (int i = 0; i

What’s happening here?

• int i = 0 → Start at 0
• i → Keep going as long as i is less than 5
• i++ → Add 1 each time

This prints 5 messages - once per enemy. Great for counted repetition.

🔁 while Loop – Repeat Until a Condition Changes

1int lives = 3;2 3while (lives > 0)4{5    Debug.Log("Still alive!");6    lives--;7}

• This runs as long as lives is more than 0.
• Each time through, it prints the message and decreases lives.

Be careful! A while loop won’t stop unless the condition eventually becomes false. That’s how infinite loops happen 🌀

🧪 Unity Example – Spawning Objects with a Loop

Here’s a simple for loop in Unity that spawns 5 cubes in a row:

1using UnityEngine;2 3public class Spawner : MonoBehaviour4{5    public GameObject cubePrefab;6 7    void Start()8    {9        for (int i = 0; i

• Attach this script to an empty GameObject
• Assign a prefab in the Inspector
• Hit play and voilà – five glorious cubes

🧠 When to Use What?

💥 Common Mistake: Infinite Loops

1while (true)2{3    Debug.Log("Wheeeeee!");4}

• Unless you're a fan of frozen editors, don’t do this without a break condition!
• Unity will get stuck, and you’ll become best friends with the Task Manager.

🧠 Recap

• for loops = best for doing things a set number of times
• while loops = best for doing something until a condition changes
• Combine loops with other logic for powerful effects
• Loops are perfect for spawning, timers, and repeating animations

🧪 Mini Challenge: Make a Star Row

1. Create a prefab (e.g. a star sprite)
2. Create a script StarSpawner.cs
3. In Start(), use a for loop to spawn 10 stars in a line
4. Use the loop variable to space them evenly (like i * 1.5f)

Bonus: Add a public int starCount to control how many are spawned.

🚀 What’s Next?

You’ve now got variables, methods, logic, and loops! It’s time to combine everything into a simple class to represent real objects in your game.

👤 Go to Lesson 11 → Classes and Objects in Unity C#