It means "What is the purpose?". The phrase is often used when a person believes that there is no advantage in taking a particular action. For example, What is the point in taking an umbrella on a bright sunny day?
In some diagram that is know to you but not to me.In some diagram that is know to you but not to me.In some diagram that is know to you but not to me.In some diagram that is know to you but not to me.
the point is represent location , it has no dimension and it is named using capital letter\s .
== ==
The seventh to the left of the decimal point.