createCanvas(400, 400);

  let iterations = 10;

  let a = 1;

  let b = 1 / sqrt(2);

  let am = AM(a, b);

  let gm = GM(a, b);

  let agm = AGM(a, b, iterations);

  print("a:   " + a);

  print("b:   " + b);

  print("AM:  " + am);

  print("GM:  " + gm);

  print("AGM: " + agm);

}

​

function draw() {

  background(220);

}

​

function AGM(a, b, iterations)

{

  if (iterations < 1)

    return 0;

  if (iterations === 1)

    return AM(a, b);

  return AGM(AM(a, b), GM(a, b), iterations - 1);

}

​

function AM(a, b)

{

  return (a + b) / 2;

}

​

function GM(a, b)

{

  return sqrt(a * b);

}

​