Built in shell variables


Built-in shell variables.

VariableUse
$#Stores the number of command-line arguments that were passed to the shell program.
$?Stores the exit value of the last command that was executed.
$0Stores the first word of the entered command (the name of the shell program).
$*Stores all the arguments that were entered on the command line ($1 $2 ...).
"$@"Stores all the arguments that were entered on the command line, individually quoted ("$1" "$2" ...).

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