Question

I am writing a csh shell script, run where the user is expected to pass a path into it as the $1 variable. How can I determine if $1 is missing and define a default value instead for it?

Answer 1

You can do something like:

if [ $# -eq 0 ];then
        dir='default' # argument not passed use default.
else
        dir=$1        # argument passed..use it.
fi

# use $dir 
ls $dir