Rand
From UBot Studio
This function returns a random number between the minimum and maximum values. $Rand is a Math Function.
You can use the Rand anywhere you need a random value. You can use it anywhere from a qualifier in the if then else command, to the eval constant. It is simply there to provide a random number between two values.
Example
navigate("http://www.ubotstudio.com/playground/simple-form", "Wait") loop(5) {
type text(<about me textarea>, "{$rand(100, 200)},", "Standard")
}
Running this script will fill the field with 5 numbers between 100 and 200.