// prints the users input 
var result = 0

for (var i = 2; i < process.argv.length; i++)
	  result += Number(process.argv[i])

		console.log(result)

// prints the users input
var result = "";

for (var i = 2; i < process.argv.length; i++){
	result += process.argv[i];
}

console.log(result);

Update SimpleIO.js