Screen.width

Description

The current width of the screen window in pixels (Read Only).

This is the actual width of the Player window. In full-screen mode, it also reflects the current resolution.

Note: When accessed from the Editor events, such as ContextMenu methods, inspector enable/disable actions, or custom Editor scripts, Screen.width and Screen.height return the current Game view window resolution in the Unity Editor. These properties do not reflect the resolution of the Player or target device in these contexts, including Simulator mode.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        //Output the current screen window width in the console
        Debug.Log("Screen Width : " + Screen.width);
    }
}