This is code should outputs my age but it doesn't and I don't why it's happening, can someone pls enlighten me??

Question

birth_year = input("birth_year ")
age = 2019-int("birth_year")
print(age)

Answer 1

"birth_day" is a string.
birth_day is a variable.

Remove quotes in 2nd time..

Answer 2

Jayakrishna🇮🇳 thank you for enlightening me 💙