Q.Write a program that asks the user to enter one's name and age. Print out a message addressed to the user that tells the user the year in which he/she will turn 100 years old.

This is a plain theory question asking for a Python program that takes name and age as input, calculates the year when the user turns 100, and prints a personalized message.

The program needs to:

1. Accept the user's name (string input)
2. Accept the user's age (integer input)
3. Calculate how many years remain until the user is 100
4. Determine the calendar year when that happens
5. Print a message with the user's name and that year

import datetime

name = input("Enter your name: ")
age = int(input("Enter your age: "))

current_year = datetime.datetime.now().year
years_to_100 = 100 - age
year_turn_100 = current_year + years_to_100

print(f"{name}, you will turn 100 years old in the year {year_turn_100}.")

Expected Output (example run):

Enter your name: Priya
Enter your age: 17
Priya, you will turn 100 years old in the year 2107.

Key lines explained:

• datetime.datetime.now().year fetches the current calendar year dynamically, so the program remains correct regardless of when it runs. …

Why this approach works

The problem requires three pieces of information: the user's name (a string), their current age (an integer), and the current year. Python's input() function reads strings from the console, so we need int() to convert the age into a number we can calculate with. The year someone turns 100 is straightforward arithmetic: if you are currently n years old, you will turn 100 in (100 - n) years from now, which is \text{current year} + (100 - n).

We can get the current year using Python's datetime module, which provides datetime.now().year. This avoids hardcoding the year and makes the program work correctly no matter when it is run.

Complete solution

from datetime import datetime

# Get user input
name = input("Enter your name: ")
age = int(input("Enter your age: "))

# Calculate the year they turn 100
current_year = datetime.now().year
years_to_100 = 100 - age
year_turn_100 = current_year + years_to_100

# Print the personalized message
print(f"{name}, you will turn 100 years old in the year {year_turn_100}.")

Expected output

If the user enters "Arjun" and 18 in the year 2025:

Enter your name: Arjun
Enter your age: 18
Arjun, you will turn 100 years old in the year 2107.

Key lines explained

age = int(input("Enter your age: "))

The input() function always returns a string. To perform arithmetic, we must convert it to an integer with int(). Forgetting this conversion would cause a TypeError when we try to subtract.

years_to_100 = 100 - age

If someone is 18, they need 100 - 18 = 82 more years to reach 100. This is the offset we add to the current year.

datetime.now().year …