Since most of your code will be from command line, passing parameters maybe necessary to make the code usable, make sure that you document your work. Here is how to pass argument to Node.js program.

Create the following code and save it in wk$4\_$args.js

console.log$($process$.$argv$)$;

$>$node wk$4\_$args.js

You will get something like this;

$[\text{'}$C:$\backslash$

odejs$\backslash$

ode.exe', $\text{'}$C:$\backslash \backslash$ENTD$261\backslash \backslash$w$4\_$args.js$\text{'}]$

Now comment the above code and add the following code;

$//$ console.log$($process$.$argv$)$;

if $($process$.$argv.length $<=2)\{$

console.log$("$Usage: $"+"$ SOME$\_$PARAM"$)$;

process.exit$(-1)$;

$\}$

console.log$(\text{'}$Params: $\text{'}+$ process.argv.length$)$;

console.log$(\text{'}$University: $\text{'}+$ process.argv$[2])$;

console.log$(\text{'}$Class: $\text{'}+$ process.argv$[3])$;

$//$ Test the code

$//$ node w$4\_$args.js

$//$ node w$4\_$args.js Apus ENTD$261$

Now uncomment the above line and run the code again, pay attention to the results. To debug any of the code, use console.log to examine the variables where you have an issue.