Questions regarding 'try-catch' blocks in node.js

try-catch-questions.js

/*
The example provided had a 'throw new Error' statement in the try section
see below
*/

try {
	throw new Error('Unable to do the thing you wanted');	
} catch(e){
	console.log(e.message);
} finally {
	console.log('Finally block executed!');
}
console.log('try-catch ended');

/* 
(2) With the challenge you set for us, you used a different format ie no 
'throw new Error' statement occured in the 'try' block. Why not?
Below is my approach, which as you can see follows the format of the
example provided.
*/
function doWork(){
	// throw an error that says unable to work
	console.log("Unable to work!");
}

try {
	// call doWork()
	throw new Error(doWork());
} catch (e) {
	console.log(e.message);
} finally {
	console.log('Finally block executed!');
}
console.log('try-catch2, ended.');
/* Is this wrong? */

/* (3) With the final challenge for the encrypted password program
You asked us to include 'try-catch' blocks.
Again in the solution, there was no 'throw new Error()' statement in the try blocks
ie, see below for an example
*/
if (command === 'create') {
		try {
				var createdAccount = createAccount({
				name: argv.name,
				username: argv.username,
				password: argv.password
			}, argv.masterPassword);
			console.log('Account created!');
			console.log(createdAccount);
		} catch (e) {
			console.log('Unable to create the account!');
		}
		/*A 'catch' block  - somehow is able to catch any error from the 'try' block - that is missing a 
		'throw new Error()' statement. Since I was following the first example you gave us. I was wondering
		'Why is he doing it like that?'
		You did the same thing for the 2nd 'try-catch' block.
		Finally, I see that the 'try-catch' blocks are nested within the conditional (if) statement. Is this the general rule to
		be followed when deploying 'try-catch' blocks?
		*/
} else if (command === 'get') {
		try{
			var fetchedAccount = getAccount(argv.name, argv.masterPassword);

			if (typeof fetchedAccount === 'undefined') {
				console.log('Account not found');
			} else {
				console.log('Account found!');
				console.log(fetchedAccount);
			}	
		} catch (e) {
			console.log('Unable to get the requested account.');
		}
		
	}