Why C# powers Unity behavior - See It in Action

Why C# Powers Unity Behavior

📖 Scenario: You are creating a simple Unity game where a character moves when you press arrow keys. Unity uses C# scripts to control game objects and their behavior.

🎯 Goal: Build a basic C# script in Unity that moves a game object using keyboard input, showing how C# controls Unity behavior.

📋 What You'll Learn

Create a C# script with a variable to control speed

Add a method to read keyboard input

Use the input to move the game object

Print the current position of the game object

💡 Why This Matters

🌍 Real World

Game developers use C# scripts in Unity to make characters and objects respond to player input and game events.

💼 Career

Understanding how to write C# scripts for Unity is essential for game programming jobs and interactive 3D applications.

1

Create a speed variable

Create a public float variable called speed and set it to 5f inside the PlayerMovement class.

Unity

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    // Create a public float variable called speed and set it to 5f
    // Your code here
}

Need a hint?

Use public float speed = 5f; inside the class to create the speed variable.

2

Add Update method to read input

Add an Update() method inside the PlayerMovement class. Inside it, create two float variables called moveX and moveZ that get input from Input.GetAxis("Horizontal") and Input.GetAxis("Vertical") respectively.

Unity

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed = 5f;

    // Add Update method and get input for moveX and moveZ
    // Your code here
}

Need a hint?

Use void Update() and inside it assign moveX and moveZ using Input.GetAxis.

3

Move the game object using input

Inside the Update() method, create a Vector3 called movement using moveX, 0f, and moveZ. Then move the game object by adding movement * speed * Time.deltaTime to transform.position.

Unity

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed = 5f;

    void Update()
    {
        float moveX = Input.GetAxis("Horizontal");
        float moveZ = Input.GetAxis("Vertical");

        // Create movement vector and move the game object
        // Your code here
    }
}

Need a hint?

Create a Vector3 for movement and add it to transform.position multiplied by speed and Time.deltaTime.

4

Print the current position

Add a line inside the Update() method to print the current transform.position using Debug.Log.

Unity

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed = 5f;

    void Update()
    {
        float moveX = Input.GetAxis("Horizontal");
        float moveZ = Input.GetAxis("Vertical");

        Vector3 movement = new Vector3(moveX, 0f, moveZ);
        transform.position += movement * speed * Time.deltaTime;

        // Print the current position
        // Your code here
    }
}

Need a hint?

Use Debug.Log(transform.position); to print the position in the console.