java

How would you write a function that tells me if its argument is a power of 2?

re: java

...Very Carefully!

re: java

How incredibly helpful...

Can you not divide the number by two and then see if the remaining number is a whole number... math.floor or something (sorry I am useless at math...)

The Sun Java API is a fantastic tool for finding out anything ... *cough* much better than MSDN *cough* .... sorry.

You can find it here

re: java

Sorry, sometimes I only feel the need to put as much effort into my answers as a the original poster put into making their question.

Also, we don't solve your homework questions for you. You need to use your resources at school to solve the problem. If you have specific technical problems that you want to ask about the provide some code so that we can help you, otherwise do not expect us to solve your problem for you.

re: java

There's many quick ways, depending on how the number is stored.
I prefer using some of the Long class members,
http://java.sun.com/j2se/1.5.0/docs/...lang/Long.html

eg. say number is num
if (Long.bitCount(num) == 1)