Learning Unity Day : 1 -

Day1:

I learned about classes, namespaces and declaring variables…

1st Program:

using System.Collections;
using System.Collections.Generic;?
using UnityEngine;?
?
public class Test : MonoBehaviour?
?
{?
?
    Rigidbody2D _rb;?
?
    float _walkspeed;?
    float _inputHorizontal;?
?
    // Start is called before the first frame update?
    void Start()?
    {?
        _rb = gameObject.GetComponent<Rigidbody2D>();?
?
        _walkspeed = 5.5f;?
    }?
?
    // Update is called once per frame?
    void Update()?
    {?
        _inputHorizontal = Input.GetAxisRaw("Horizontal");?
?
        if(_inputHorizontal != 0)?
        {?
            _rb.AddForce(new Vector2(_inputHorizontal * _walkspeed, 0f));?
        }?
    }?
}??        

From above program:

System.Collections;
System.Collections.Generic;?
UnityEngine;        

- These are called namespaces. Simply namespace is the collection of classes... We can say them library also...

public class Test : MonoBehaviour?        

- MonoBehaviour is the class which is inside the namespace named UnityEngine and now we can access void Start() and void Update() which is also simply the syntax of class MonoBehaviour...