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Functions

Functions are a core feature of Ra. You can define your own functions and use built-in functions.

Defining Functions​

Use the fn keyword to define functions:

let add = fn(x, y) {
    return x + y;
};

puts(add(3, 7));  # Call the function

Built-in Functions​

Ra provides built-in functions like puts, max, and len:

puts("Hello, Ra ð“‹¹!");  # Print to console

let maxInt = max(10, 20, 5);  # Find the maximum value
puts(maxInt);

Recursion​

Ra supports recursive functions:

let factorial = fn(n) {
    if (n == 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
};

puts(factorial(5));  # Calculate factorial of 5

Closures​

Ra supports closures, which are functions that capture variables from their surrounding environment:

let count = 0;
let add = fn() {
    count += 1;
    return count;
};

puts(add());  # Prints 1