How do I create custom initializers and convenience initializers?

class Person {
    var name: String
    var age: Int
    
    // Custom initializer
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
    
    // Convenience initializer
    convenience init(name: String) {
        self.init(name: name, age: 0) // Default age to 0
    }
}

// Usage
let person1 = Person(name: "John", age: 30) // Using custom initializer
let person2 = Person(name: "Jane") // Using convenience initializer