Streamline your workflow with command line arguments – learn how in real-time.

Command line arguments are a way to pass additional information or parameters to a program or script when it is executed from the command line.

You can access command-line arguments via the global process object. The process object has an 'argv' property which is an array containing the complete command-line. i.e. process.argv.

console.log(process.argv)

Run it with some numbers as arguments. e.g: node learn.js 1 2 3

In which case the output would be an array looking something like:

['node', '/path/to/your/learn.js', '1', '2', '3']

The first element of the process.argv array is always 'node', and the second element is always the path to your learn.js file, so you need to start at the 3rd element (index 2), adding each item to the total until you reach the end of the array.

Also be aware that all elements of process.argv are strings and you may need to coerce them into numbers. You can do this by prefixing the property with + or passing it to Number(). e.g. +process.argv[2] or Number(process.argv[2]).

They can be used in a variety of ways in real-time applications, including:

1. Configuring program behavior: Command line arguments can be used to configure a program's behavior, such as setting specific options, toggling features on or off, or specifying input and output files. For example, a command line argument might be used to set the logging level for a program or to specify the path to a configuration file.
2. Automating tasks: Command line arguments can be used to automate repetitive tasks, such as batch processing or file conversion. For example, a command line argument might be used to specify a folder containing images to resize or to specify a file format for conversion.
3. Debugging and troubleshooting: Command line arguments can be used to enable debugging and troubleshooting features in a program, such as enabling verbose output or logging debug information to a file.
4. Testing and development: Command line arguments can be used to facilitate testing and development, such as specifying different test cases or data sets to use in a program.

Overall, command line arguments are a versatile tool that can be used to customize program behavior, automate tasks, and simplify development and testing.