What does $# stand for?

$# will return the number of parameters that are passed as the command-line arguments.

$# means, number of positional parameters set

Print $#This will return the last command is run successfully or not.If it will return 0 then it ran successfully. And if it will return other then 0 thenThere is some problem

I think it is $? not $# which returns the status of the last executed command

$# returns the number of parameters that are passed to a shell script
$? returns the exit code of the last executed command (0 : Successful, 1 or other: Failed)

By using $# parameter, the program checks whether the right number of arguments have been entered.

$# : Stands for counts of the number of the positional parameters passed to a script.

example test.sh 1 2 3 4 5 6 7 , there are 7 paramaters as passed so the count of the $# is 7