Python

class Person: def init(self, initialAge): self.age = initialAge

@property
def age(self):
    return self.__age

@age.setter
def age(self, value):
    if value < 0:
        value = 0
        print("Age is not valid, setting age to 0.")
    self.__age = value

def amIOld(self):
    if self.age < 13:
        print("You are young.")
    elif 13 <= self.age < 18:
        print("You are a teenager.")
    else:
        print("You are old.")

def yearPasses(self):
    self.age += 1

Python code

class Person:
    def __init__(self,initialAge):
        self.initialAge=initialAge
        if self.initialAge<0:
            print("Age is not valid, setting age to 0.")
    def amIOld(self):
        if self.initialAge < 13:
            print("You are young.") 
        elif self.initialAge>=13 and self.initialAge<18:
            print("You are a teenager.")
        else:
            print("You are old.")
    def yearPasses(self):
        self.initialAge+=1

t = int(input())
for i in range(0, t):
    age = int(input())         
    p = Person(age)  
    p.amIOld()
    for j in range(0, 3):
        p.yearPasses()       
    p.amIOld()
    print("")

public Person(int initialAge) {

    if(initialAge < 0 ){
        System.out.println("Age is not valid, setting age to 0.");
    }
    else{
        this.age =initialAge;
    }
}

public void amIOld() {
    if(age < 13){
        System.out.println("You are young.");
    }
    else if( age >= 13 && age < 18 ) {
        System.out.println("You are a teenager.");
    }
    else{
        System.out.println("You are old.");
    }

}

public void yearPasses() {
    age ++;
}

public static void main(String[] args) {

class Person: def init(self, initialAge): # Corrected constructor name if initialAge < 0: print("Age is not valid, setting age to 0.") self.age = 0 else: self.age = initialAge

def amIOld(self): if self.age < 13: print("You are young.") elif self.age >= 13 and self.age < 18: print("You are a teenager.") else: print("You are old.")

def yearPasses(self): self.age += 1

constructor is called only once tat to for -1