open a text file and print each line


Exercise #1

    Open https://arato.inf.unideb.hu/szathmary.laszlo/pmwiki/index.php?n=EnPy3.20120818h
    and save the data (the 50 numbers) in a file called `numbers.txt`.
    Write a program that calculates the sum of the numbers in `numbers.txt`.


Exercise #2

    Modify the previous program. Write the result to a file called `result.txt`.


Tip

    >>> int("2023")    # convert a string to a number
    2023