Arguments

Concepts:
How to pass arguments from a shell to a bash script

Text:
Implement a bash script that:

• prints the number of arguments passed to the script
• checks the number of arguments passed to the script and, in the case the number is different than 3, the script must print an error message before stopping the execution
• prints the name of the script
• prints the arguments passed to the script (in two different ways)

Solution:

arguments.sh

#!/bin/bash
 
echo "Number of arguments: $#"
if [ $# -ne 3 ]
then
  echo "Usage: $0 arg1 arg2 arg3"
  exit 1
fi
 
echo $0
echo $1 $2 $3
echo $*