Today we will see the HackerRank Day 4 Solution in Python. The problem is named Class vs Instance which is part of 30 Days of code on HackerRank. Let’s get started!
Day 4: Class vs Instance Problem statement
We have to 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 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, we should write the following instance methods:
- yearPasses() should increase the age instance variable by 1.
- 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..
- If age<13, print
4 -1 10 16 18
Age is not valid, setting age to 0. You are young. You are young. You are young. You are a teenager. You are a teenager. You are old. You are old. You are old.
HackerRank Day 4 Solution in Python
class Person: def __init__(self,initialAge): #Check is age is negative if initialAge<0: print("Age is not valid, setting age to 0.") self.age=0 else: self.age=initialAge #Method to perform given conditional statements def amIOld(self): #If age less than 13 if self.age<13: print("You are young.") #If age greater than 13 and lesser than 18 elif self.age>=13 and self.age<18: print("You are a teenager.") #If age greater than 18 elifc self.age>18: print("You are old.") #Method to increment age def yearPasses(self): self.age+=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("")
- After getting the input, create an object for the Person class with input age as a parameter
- Then in the constructor, check if the age is negative, then print Age is not valid, setting age to 0 and then setting the age value to 0. Else initialize age with the corresponding value
- in the amIOld method check if the age is less than 13 and print You are young.
- Then check if the age is greater than 13 and less than 18, then print You are a teenager.
- If the age is greater than 18 then print You are old
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