Deleting a property of the prototype

Objects created by calling constructor function Point have properties x and y, and inherit a property dimensions through the prototype chain:

// constructor function Point
function Point(x,y) { 
 this.x = x;
 this.y = y;
}

// Point.prototype has property dimensions
Point.prototype.dimensions = 2;

// p will inherit dimensions
var p = new Point(10, 20);

What will be printed if we access p.dimensions after calling delete on it?

// delete is called 
delete p.dimensions;

// what will be logged?
console.log(p.dimensions);