Question

What is command line argument?

Answer 1

Command line argument is a parameter supplied to the program when it is invoked.

Answer 2

It is the parameter supplied to the program when it is invoked.

This means that only when you want the parameter only then it supplies it to you.

For example,

class Prog1

{

void main(int a, int b)

Here the integer values in the brackets are the parameters.

When you write the program and execute it, before the terminal screen appears there is a dialogue box which asks you to input the values of 'a' and 'b'.

By entering the values, you are invoking the parameter that you have supplied.