let a = 5;
let b = 25;
a = a + 5;

for (let i = 0; i < 10; i++) {
  a = i + 1;
}

while (b > a) {
  b = b - 5;
  break;
}

if (b == 5 || a == b) {
  print("b is a");
} else if (a == (b-5)) {
  // ...
} else {
  // ...
}

let c = "Hello, World!";
c = str_split(c, " ");
type(c);  // "ARRAY"
len(c);   // 2

let d = [5, true, "Psychic"];
d[0];         // 5
array_pop();  // "Psychic"
array_push(d, 10);

let s = d[0:2]; // [5, true]

let fib = fn(x) {
  if (x < 2) {
    return x;
  }
  return fib(x-1) + fib(x-2);
}