Stupid questions...

Sorry about such lame questions. I'm currently using Haskell 'in anger' for the first time, so differences with other functional languages are biting me occasionally. I need to convert Ints to Strings and vice-versa. What's the best way to do this? I've not found library functions for this. Second question: Using division over integers. I appreciate that a division operator with integers as arguments can not be guaranteed to return an exact integer result. However, if I *do* want to do integer division, how should I do it? Is floor(a/b) appropriate? TIA Sarah Thompson