30 Days of Code: HackerRank Solutions for Python (Day 4)

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Task
Write a Person class with an instance variable, age, and a constructor that takes an integer, initialAge, as a parameter. The constructor must assign initialAge to age after confirming the argument passed as initialAge is not negative; if a negative argument is passed as initialAge, the constructor should set age to 0 and print Age is not valid, setting age to 0.. In addition, you must write the following instance methods:

1. yearPasses() should increase the instance variable by 1.
2. amIOld() should perform the following conditional actions:

• If age<13, print You are young..
• If age≥13 and age<18, print You are a teenager..
• Otherwise, print You are old.

Solution

class Person:
#instance variable
    age = 0
#if the initialAge is less than 0 print statement. If it is      greater than 0 set age = initialAge.
    def __init__(self,initialAge):
        if initialAge <0:
            print('Age is not valid, setting age to 0.')
        else: 
            self.age = initialAge
#if the age is less than 13 print ('You are young.')
#if it is equal to 13 and less than 18 print ('You are a teengaer.')
#all remaining ages print ('You are old.')
    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.')
#add 1 year to age.
    def yearPasses(self):
        self.age +=1

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