[LAB2-Exercise] Calculate circumference and area of a circle from its diameter (Function)

void setup()
{
  size(500,500);
}

float cir = 0;
float area = 0;

void draw()
{
  draw_Calculate(7.00,cir,area);
}

void draw_Calculate(float rad,float cir,float area )
{
  background(0);
  cir = 2 * PI * rad ;
  area = PI * sq(rad) ;
  textSize(20);
  text("Radius ="+ nfc(rad,3),250,150);
  text("Circumference ="+ nfc(cir,3),250,250);
  text("Area ="+ nfc(area,3),250,350);
}