$ or @ immediately
followed by the number of the argument on the command line. Use $ if you are expecting the user to enter an integer as a command-line argument, and @ if you are expecting a string.
Example 3.12. commandlineargs.stp
probe kernel.function(@1) { }
probe kernel.function(@1).return { }stap commandlineargs.stp kernel function). You can also specify the script to accept multiple command-line arguments, noting them as @1, @2, and so on, in the order they are entered by the user.