Level 8. Functions: Little Machines

A function is like a machine in a factory. You put something in, it does some work, and something comes out.

Imagine a pizza-making process:

1. prepare_dough() — makes the base
2. add_toppings() — puts cheese on top
3. bake() — cooks it in the oven

Each step is its own little machine. In Hica, you build machines with fun:

fun double(n) => n * 2
fun square(n) => n * n

fun main() {
  let a = double(3)    // a = 6
  let b = square(a)    // b = 36
  println(b)
}

You can chain machines. Feed the output of one into the next, like an assembly line!

🎯 Try it: Write a function triple(n) that multiplies by 3. Then call it twice:

fun triple(n) => n * 3

fun main() {
  let a = triple(4)     // What is a?
  let b = triple(a)     // What is b?
  println(b)
}