1. Alice in Action with Java Chapter 5 Random Numbers

2. Alice in Action with Java2 Random Numbers Certain kinds of applications need random numbers –simulations –games –encryption utilities use random numbers to create a code for scrambling the data being encrypted –programs that test other programs sometimes generate random sets of data

3. Alice in Action with Java3 Random Numbers in Alice The world has two functions –random number by default the function returns a number between 0 and 1 You can tell the function to use a different range by selecting more and then fill in the minimum and maximum values You can also specify integers only –choose true x% of the time

4. Alice in Action with Java4 Random Motion You could make an alice object move a random distance in a random direction with a –do together move forward/backwards by a random amount move up/down by a random amount move left/right by a random amount

5. Alice in Action with Java5 Choose true If you have an action that needs to happen some percentage of the time there is a world function to use Select choose true from the world's methods –select a per cent value