sm:tldr:9c878
sm: Display a message in full-screen.
$ sm "${Hello World!}"
try on your machine
The command "sm "${Hello World!}" is not a valid command in most programming or scripting languages.
However, assuming you meant to write it in a Unix/Linux shell environment, it could be interpreted as using the "sm" command with the argument "${Hello World!}". In this case, the "${Hello World!}" is not a special syntax and is treated as a regular string parameter.
The effect of this command would depend on what the "sm" command does. Without more context or information about the "sm" command, it's difficult to provide a specific explanation of its functionality.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.