int() - Converts the value in the parenthesis to integer data type.
An integer is any whole number: positive, negative, or 0. No decimals.
year = "2024"
age = "39"
print(year - age)
<Output Error>
However
year = "2024"
age = "39"
print(int(year) - int(age))
1985
*Note - Using int() to convert a float will just chop off the decimal point:
int(3.14) = 3
int(3.90) = 3