What is command line argument?

Question

what is its use?

Answer 1

When you run scripts from the command line, you can pass arguments to it, such as:

$ test.py inputfile.txt output.txt

Files are common arguments, but they can e anything that you want some sort of input for. How you access those arguments depends on the language. I wrote some code as an example of how it works in Python, I'm sure it gives a good idea for other languages too:

https://code.sololearn.com/cr44589IWqoB/?ref=app

Answer 2

while interpreting the Java file with java cmd, you can pass arguments ie. String arguments.