person.pony

actor Main
    let person1: Person
    let person2: Person

    new create(env: Env) =>
        person1 = Person("Jupiter", 17, "male)
        env.out.print(person1.summary())    
    
        person2 = Person("Robert", 16, "male")
        env.out.print(person2.summary())

class Person
    let _name: String
    let _age: I32
    let _gender: String

    new create(name: String, age: I32, gender: String) =>
        _name = name
        _age = age
        _gender = gender
    fun summary(): String =>
        if gender is "male" then
            "This person is called " + _name + " and he is " + _age.string() + " years old."
        end

you error in this btw is that on line 6 that "male

isn't closed