Input.GetMouseButton

Description

Returns whether the given mouse button is held down.

Note: This API is part of the legacy Input class, and not recommended for new projects. The documentation is provided here to support legacy projects that use the old Input Manager and Input class. For new projects you should use the newer and Input System Package. (read more).

The button values are: 0 for the left button, 1 for the right button, 2 for the middle button. The return is true when the mouse button is pressed down, and false when released.

using UnityEngine;
using System.Collections;

// Detects clicks from the mouse and prints a message
// depending on the click detected.

public class ExampleClass : MonoBehaviour
{
    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            Debug.Log("The left mouse button is being held down.");
        }

        if (Input.GetMouseButton(1))
        {
            Debug.Log("The right mouse button is being held down.");
        }

        if (Input.GetMouseButton(2))
        {
            Debug.Log("The middle mouse button is being held down.");
        }
    }
}