Check where mouse is clicked

Hello!
When you use Input.GetMouseButtonDown(0), what’s a way where you could tell where it is pressed? Pretty much I want it to be like where if you click the left of the screen, it does a function, and if you press the right, another function. Please help me a little with coding, epically with raycasting since I am pretty new to this stuff.
Thanks!

If that’s all that you want no raycast is needed just check if Input.mousePosition.x is greater than Screen.width * 0.5f, if so your click was on the right side of the screen, otherwise left.

private void Update()
{
	if(Input.GetMouseButtonDown(0))
	{
		if(Input.mousePosition.x > Screen.width * 0.5f)
        {
            //Right side.
        }
        else
        {
            //Left side.
        }
	}
}