Lab1-Area and Circumference circle

void setup(){
  size(300,300);
  background(#FFFF00);

  int d = 98;//diameter
  int r= d/2;//radius
  float A;//area
  float cir;//circumference
  size(500,500);
  cir=2*PI*r;//calculate circumferance
  A=PI*r*r;//calculate area

  textSize(25);
  fill(0);
  text("Diameter =" +d,20,100);
  text("Radius =" +r,20,150);
  text("Circumferance =" +cir,20,200);
  text("area =" +A,20,250);
}