Need help script unity android game

Unity Engine
1

I am creating a game for android with unity program , and I want to touch the screen would make the action of attacking or pressing a button created to attack , if someone could give me a script for my problem would appreciate,thanks.

2

To make a simple attack button, use Unity’s GUI and put your attack code in a method, like this:

public void Attack(){

//Attack Code Goes Here

}

void OnGUI(){
     if(GUI.Button(new Rect(0, 0, 30, 30), "ATTACK")){
          Attack();
     }
}

Of course, you should really put the factors used here into variables and use screen divisions to position the button.