====== BASH - Commands - Command Line Arguments ======

Getting arguments directly from the command shell can be beneficial in a number of cases.

<file bash test.sh>
#!/bin/bash
echo "Total arguments : $#"
echo "First Argument = $1"
echo "Second Argument = $2"
</file>

Run this script with two additional parameters after its name.

<code bash>
./test.sh Hello Peter
</code>

<WRAP info>
**NOTE:**  **$1** is used for accessing the first argument, **$2** for the second, and so on.

The **$#** is used for getting the total number of arguments.

</WRAP>

----

===== Getting Arguments with Names =====

The below example shows how to get command-line arguments with their names.

<file bash test.sh>
#!/bin/bash

for arg in "$@"
do
index=$(echo $arg | cut -f1 -d=)
val=$(echo $arg | cut -f2 -d=)

case $index in
X) x=$val;;
Y) y=$val;;
*)
esac

done

((result=x+y))

echo "X+Y=$result"
</file>

Run this script with two additional parameters after its name.

<code bash>
./test.sh X=44 Y=100
</code>

returns

<code bash>
X+Y=144
</code>

<WRAP info>
**NOTE:**  The arguments here are stored inside **‘$@‘** and the script fetches them using the Linux **cut** command.
</WRAP>