Would you use num%2 or num&1 to check if a number is even?

Question

Well, there are at least two low-level ways of determining whether a given number is even or not:

 1. if (num%2 == 0) { /* even */ } 
 2. if ((num&1) ==          


        

Answer 1

At this point, I may be just adding to the noise, but as far as readability goes, the modulo option makes more sense. If your code is not readable, it's practically useless.

Also, unless this is code to be run on a system that's really strapped for resources (I'm thinking microcontroller), don't try to optimize for the compiler's optimizer.