One useful thing for games are **random numbers**.

Random numbers in BASIC are implemented by `RND`. For example:

PRINT "Wikibooks' coolness quotient: ", RND, "%"

You will get "Wikibooks' coolness quotient: .7055475%". That decimal looks random. Run it again and you still get it! That makes a game boring. What do you do? Initialize the random number generator! That's done with `RANDOMIZE`, which takes a seed as its first parameter. You should use something that changes for the seed. `TIMER` does, so it is a great seed. The above program evolves to:

RANDOMIZE TIMER PRINT "Wikibooks' coolness quotient: ", RND, "%"

which will print "Wikibooks' coolness quotient: .8532526%" and another time will print "Wikibooks' coolness quotient: .3582422%". Better, right?

But decimal numbers are boring. If you want a whole number, you must get a random number, multiply by and add to the result.

The above program morphs to:

RANDOMIZE TIMER DIM PER AS INTEGER PER = RND * 99 + 1 PRINT "Wikibooks' coolness quotient: ", PER, "%"

which will print "Wikibooks' coolness quotient: 85%".