How does the conditional statement [ $# -eq 0 ] work?

The conditional statement [ $# -eq 0 ] is used in a bash script to check if no arguments were passed to the script. Here's a breakdown of the components:

• $#: This variable holds the number of positional parameters (arguments) passed to the script.
• -eq: This is a comparison operator that checks for equality.
• 0: This is the value being compared against.

So, the condition [ $# -eq 0 ] evaluates to true if the number of arguments passed to the script is equal to zero. If this condition is true, you can execute a block of code, typically to handle the case where no arguments were provided.

Here's an example:

#!/bin/bash

if [ $# -eq 0 ]; then
    echo "No arguments provided."
else
    echo "Arguments provided: $@"
fi

In this script, if no arguments are given when running the script, it will output "No arguments provided." Otherwise, it will display the provided arguments.