bash check arguments code example

Example 1: verify parameter one bash

if [ -z "$1" ]
  then
    echo "No argument supplied"
fi

Example 2: shell script get arguments

$ myscript.sh first_arg second_arg

# myscript.sh
#!/bin/bash
echo $1 # output: first_arg
echo $2 # output: second_arg

Example 3: if argument bash

if [ -z "$1" ]
  then
    echo "No argument supplied"
fi

if ["$1" ]
  then
    echo "Argument supplied is: "$1
fi