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Solution: Birthday Calculator

Explore how to write a Python program that takes a user's birth year input, converts it into a number, calculates their age using arithmetic, and displays the result with a friendly message.

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In this program, we’re asking the user for their birth year and then using it to calculate their age.

  • input() lets the user type something. Whatever they type is stored in the variable birth_year.

  • The value from input() is always a string (text), so we use int() to convert it into a number before doing math.

  • We store the current year (2025) in another variable.

  • The line age = current_year - int(birth_year) calculates the user’s age.

  • Finally, print() displays a friendly message with their approximate age.

birth_year = input("What year were you born? ")
current_year = 2025
age = current_year - int(birth_year)

print("You are about", age, "years old!")
Code asking for birth year and calculating age