Level 9. The Magic Arrow (=>)

When a function does just one thing, you can use the Hica Arrow instead of writing curly braces. Think of it as: “this goes in, that comes out.”

// With curly braces (block body)
fun double(n) {
  n * 2
}

// With the arrow (same thing, shorter!)
fun double(n) => n * 2

The arrow is like a shortcut: one line, no braces, no fuss. Professional programmers love shortcuts like this.

🎯 Try it: Rewrite this block-body function using the arrow:

fun add_ten(n) {
  n + 10
}