Random number generation tools

When testing software that relies on number inputs, it's easy to get caught up and use the same kinds of numbers over and over. To add variability, (and increase your chances of discovering something interesting) use tools to create numbers for you to test. Random.org has a lot of options available online.

In Ruby, all you need is to call the "rand" method in IRB. ex. try typing rand(32), rand(100), rand(1000) in IRB. Other programming and scripting languages have similar functionality.

In Excel 2007, try the RANDBETWEEN function: =RANDBETWEEN(-100,100)