Built-in Usage Help
See also: help (command)It is usual for a program to be able to display a brief summary of its parameters, typically when invoked with no arguments or one of ?, -?, -h, /?, /h, -help, or --help. Entering a program name without parameters in the hope that it will display parameters can be hazardous, as some programs and scripts execute without further ado.
Read more about this topic: Swit Char, Anatomy of A Shell CLI
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