Course of Raku / Objects, I/O, and exceptions / Classes and objects / Methods

Methods with parameters

A method can take parameters, just like a subroutine. You list them in parentheses after the method name:

class Account {
    has $.balance is rw = 0;

    method deposit($amount) {
        $.balance += $amount;
    }
}

The deposit method takes one parameter, $amount, and adds it to the object’s balance:

my $a = Account.new;
$a.deposit(100);
$a.deposit(50);
say $a.balance; # 150

Each call works on the object it was called on, so the same method can update different objects independently. Methods can take positional and named parameters, default values, and everything else you have already seen in subroutine signatures.

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