Function OnTouchDown?

I need a function like
function OnMouseDown(){/*What I want todo*/ }
but for mobile

https://unity3d.com/learn/tutorials/projects/2d-roguelike/mobile

https://unity3d.com/learn/tutorials/modules/beginner/platform-specific/multitouch-input

http://pixelnest.io/tutorials/unity-touch-controls/

https://www.binpress.com/tutorial/unity3d-touch-input/133

if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
{
// Do something
}