random number from -9 to 9 in C++

Question

just wondering, if I have the following code:

int randomNum = rand() % 18 + (-9);

will this create a random number from -9 to 9?

Answer 1

Your code returns number between (0-9 and 17-9) = (-9 and 8).

For your information

 rand() % N;

returns number between 0 and N-1 :)

The right code is

rand() % 19 + (-9);