Today at school we went over the answers of the test we took last time. There was one questions I got totally wrong. A couple people including myself grumbled that it was a trick question. The instructor said it came straight out of the book.
Here is the question: What does the following code snippet output:
for (n=4; n > 0; n--);
Here is a hint. There is only one line in the output. At first I protested. Surely this code should have 4 lines of output. The loop iterates through four times after all.
The trick was that there was a semicolon directly after the for loop. Therefore the loop has a body which was empty. After the loop finished, n equals 0. Then the program executes one println statement. Yeah. That's an evil question. Now I know better. Watch out for the tricks.
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1 week ago