The following is a demonstration of the guess.d script, guess.d is a guessing game written in DTrace. It goes like this, # ./guess.d guess.d - Guess a number between 1 and 100 Enter guess 1: 50 Lower... Enter guess 2: 25 Higher... Enter guess 3: 37 Higher... Enter guess 4: 44 Higher... Enter guess 5: 48 Lower... Enter guess 6: 46 Lower... Enter guess 7: 45 Correct! That took 7 guesses. Please enter your name: Brendan Gregg Previous high scores, Fred Nurk 7 Brendan Gregg 7 It was written as a demonstration of the same code written in dozens of languages. It makes a good demonstration, as it covers integer and string variables, conditional statements, loops, keyboard input, screen output, and file input and output. Written in DTrace however, is not such a good demonstration! DTrace doesn't have loops (it doesn't really need them either) which made the code a little odd. DTrace also doesn't have keyboard input... So this script is somewhat amusing as an example, but not terribly useful.