//  areaOfPizza.js
//  P. Conrad for CISC103, 11/01/2007


// function areaOfPizza
//   consumes: diameter, a number, diameter of a pizza in inches
//   produces: area, a number, area of a pizza in square inches
// 
//   Examples:
//      js> areaOfPizza(20)
//      314.16 inches
//      js> 

function areaOfPizza(diameter) {
 return (Math.PI * (diameter/2) * (diameter/2));
}