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The command /${something} is written in a format commonly used in programming and scripting languages called variable interpolation.
This command assumes that "something" is a variable, and it uses the ${...} syntax to access and insert the value of that variable into a string or a command sequence.
For example, let's say the variable "something" has a value of "world". If you were to use the command /${something}, it would be interpreted as /world. The real value of the variable is substituted in place of the variable reference, resulting in the actual command or string you want to use.
Variable interpolation allows for dynamic and flexible programming by enabling you to insert variable values into commands or strings, making them more adaptable and reusable.