Give a single line "C type" expression to evaluate (-1)^k using only +,-,* and % operators.

1-k%2*2

Due to operator precedence, the order of evaluation is %, *, -; so no parentheses are necessary. (Both % and * have the same precedence, so % is evaluated first because it is to the left of *.)

Edited on January 27, 2008, 11:43 am

Posted by Kurious on 2008-01-27 11:36:52