Can't run JS on Node.js

Question

I had installed Node.js to run JS codes that I was doing on LeetCode, but I wasn't able to run the code with it, after that I installed on VS Code the extension named Code Runner, but this is what I've got on the output:

[Running] node "d:\Microsoft VS Code\projects\testing.js"

[Done] exited with code=0 in 0.075 seconds

And here's the code:

function sum(a, b) {return a + b;}

sum(10, 20);

I really don't know why this is happening... :(

it did, I called the function sum on the last line, and also if I write console.log("Hello World") it returns the same thing... — JellySquare
– JellySquare, Commented Jul 10, 2020 at 2:01
How about you open a terminal in your code directory and run node testing.js does that work better ? You should see an output to the console if you do `console.log("Hello World") at the end. If you do well, code runner extension is broken maybe. — WilomGfx
– WilomGfx, Commented Jul 10, 2020 at 2:05
You called the function—the function doesn’t do anything other than return a value, which you ignore. — Dave Newton
– Dave Newton, Commented Jul 10, 2020 at 2:06
changed the code to only console.log("Hello World") and ran it on a Windows Terminal using node and it returned nothing, just ran the code and give nothing as output... — JellySquare
– JellySquare, Commented Jul 10, 2020 at 2:11

RenierC · Accepted Answer · 2020-07-10 02:08:40Z

1

Perhaps it's a bit unrelated but since you mention that you do code challenges I find that quick prototyping, or using scratchpads works great to do lots of changes and see them in real time.

Try REPL or CodeSandbox

Note: I personally use condesandbox for it, you just put the variable that you want in a console.log() and it will print on it's own as you go

answered Jul 10, 2020 at 2:08

RenierC

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4 Comments

JellySquare Over a year ago

I haven't heard about REPL, going to give it a try, but I just wanted to use VS Code for the challenges because I really enjoy the IDE, and doing everything (notetaking for logic for example) in just one place would be great for me

RenierC Over a year ago

Oh. there is a great extension that can help you in vsCode for that quokkajs.com

JellySquare Over a year ago

Yes, but that extension doesn't actually run the code right?

RenierC Over a year ago

mainly shows the return outputs, the console logs and the values that variable holds. As it implies it's for rapid prototyping. For coding challenges I have found that it's more than enough

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