Errors and files

Handle problems without crashing, and read and write files safely.

Bad input should not crash your program. Wrap the risky line in try, and name the exact error you expect.

Expected output

42
0

finally

Expected output

Cannot divide by zero
Done

Use with, which closes the file for you even if something goes wrong. "w" writes, "a" adds to the end, and "r" reads.

Expected output

Line one
Line two