16

Question 1

Why is the % character a “modulus” and not a “percent”?

Answer 1

Mostly that’s just how the designers chose to use that symbol. In normal writing you are correct to read it as a “percent.” In programming this calculation is typically done with simple division and the / operator. The % modulus is a different operation that just happens to use the % symbol.

Question 4

How does % work?

Answer 4

Another way to say it is, “X divided by Y with J remaining.” For example, “100 divided by 16 with 4 remaining.” The result of % is the J part, or the remaining part.

Question 5

close

Answer 5

Closes the file. Like File->Save.. in your editor.

Question 6

read

Answer 6

read – Reads the contents of the file. You can assign the result to a variable.

Question 7

readline

Answer 7

readline – Reads just one line of a text file.

Question 8

truncate

Answer 8

truncate – Empties the file. Watch out if you care about the file.

Question 9

write(‘stuff’)

Answer 9

write(‘stuff’) – Writes “stuff” to the file.