Shell Script Parameters

A bash shell script have parameters. These parameters start from $1 to $9.

When we pass arguments into the command line interface, a positional parameter is assigned to these arguments through the shell.

The first argument is assigned as $1, second argument is assigned as $2 and so on...

If there are more than 9 arguments, then tenth or onwards arguments can't be assigned as $10 or $11.

You have to either process or save the $1 parameter, then with the help of shift command drop parameter 1 and move all other arguments down by one. It will make $10 as $9, $9 as $8 and so on.

Shell Parameters

Example:

Look at the above snapshot, this is the script we have written to show the different parameters.

Look at the above snapshot, we have passed arguments 1, 5, 90. All the parameters show their value when script is run.