How do you use #define?

Question

I\'m wondering about instances when it makes sent to use #define and #if statements. I\'ve known about it for a while, but never incorporated it into my way of coding. How e

Answer 1

#define is used to define compile-time constants that you can use with #if to include or exclude bits of code.

#define USEFOREACH

#if USEFOREACH
    foreach(var item in items)
     {  
#else
    for(int i=0; i < items.Length; ++i)
     { var item = items[i];   //take item
#endif

       doSomethingWithItem(item);
     }