... Imperative Programming A s you saw in Chapter 3, you can use F# for pure functional programming. However, some issues, most notably I/O, are ... has other constructs that support imperative programming. You’ve already seen some in Chapter 3. Any example that wrote to the console included a few lines of imperative code alongside functional ... water CHAPTER 4 ■ IMPERATIVE PROGRAMMING 68 7575Ch04.qxp 4/27/07 1:00 PM Page 68 Loops over Comprehensions Y ou can use loops using f or t o enumerate collections, performing an imperative action,...