Power of ten.

void setup() {
  size(550, 500);
  background(0);
  fill(#DD0000);
  textSize(30);
  int power = 12;
  cal_ten(power);
}
//calculation power of ten
void cal_ten(int power) {
  int x = 50;
  int y = 225;
  if (power < 6) {
    text("Have no word for this number", x, y+50);
  } else if (power == 6) {
    text("6", x+80, y+50);
    text("Million", x+300, y+50);
  } else if (power == 9) {
    text("9", x+80, y+50);
    text("Billion", x+300, y+50);
  } else if (power == 12) {
    text("12", x+75, y+50);
    text("Trillion", x+300, y+50);
  } else if (power == 15) {
    text("15", x+75, y+50);
    text("Quadrillion", x+300, y+50);
  } else if (power == 18) {
    text("18", x+75, y+50);
    text("Quintillion", x+300, y+50);
  } else if (power == 21) {
    text("21", x+75, y+50);
    text("Sextillion", x+300, y+50);
  } else if (power == 30) {
    text("30", x+75, y+50);
    text("Nonillion", x+300, y+50);
  } else if (power == 100) {
    text("100", x+65, y+50);
    text("Googol", x+300, y+50);
  } else {
    text("Have no word for this number", x, y+50);
  }
  text("Power of 10", x, y);
  text("Number", x+300, y);
}