import ballerina/io;

// Person is an 'open' record type which allows fields of 'anydata' type
// to be added at runtime.
type Person record {
    string name;
    int age;
};

public function main() {
    // Create an instance of Person with an additional 'town' field.
    Person p = {
        name: "Fred",
        age: 40,
        "town": "Boston"  // extra field name needs to be in quotes
    };

    // Print name and age fields - using standard '.' syntax.
    io:print(p.name, " is ", p.age);

    // Print the additional field - using a map-like syntax.
    io:println(" and lives in ", p["town"], ".");
}