How to change the sprite in an object on click?

Question

Unity

It turned out to change the color of the object to blue when clicked.
But I did not understand how to change the sprite.
It seems in the manual it is described here
And I'm not strong in English

// Update is called once per frame
    void Update()
    {

        if (Input.GetMouseButtonDown(0))
        {
            RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);

            if (hit)
            {
                //hit.collider.GetComponent<SpriteRenderer>().color = Color.blue;
                hit.collider.GetComponent<SpriteRenderer>().sprite = //? что сюда написать
            }

        }

    }

Answer 1

Write in class public Sprite sprite;
Insert a sprite into the editor on this object
And after "=" write "sprite;" there
But you don't need all that. Why? Because without knowing how to use Google, especially without knowing English, you will not go far. you here.