how to specify an command line argument with a variable in bash -


i bash script take either 2 or 3 arguments last argument being input file open. index of argument should depend on how many arguments provided. know can realized if statement, like:

if [ $# -eq 3 ];   infile=$3 elif [ $# -eq 2 ];   infile=$2 fi

..open file read...

however hoping done 1 liner this:

infile=$($#)

it not work though. same thing infile=$"$#". possible specify index of argument directly "$#"

try using infile="${@: -1}" last argument.


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