You won't be able to answer this simple JavaScript question!

Last night, I was scrolling through twitter and I found a interesting JavaScript question, and I bet you won't be able to answer this without cheating.

Let's see how long would would it take for you to answer this one:

What does ("b" + "a" + + "a" + "a").toLowerCase() output in JavaScript?

The question does look simple, but the answer will definitely blow your mind.

Tell me how long it took you to answer in the comments.

And Yes, JavaScript is crazy!

Comments

[Meir Gabay]

I wanted to see if ChatGPT will get it right.. And it did :)

The NaN part is very interesting, as one of the "a" chars is dropped, initially, I didn't understand why it's not "bananaa" (extra "a"), now I get it 💪🏻

[Vladas Saulis]

banana

[Bob dnaeil]

What!! No wayy, how is it banana

[Bob dnaeil]

Where does the n come from??

[Jon Randy 🎖️]

Unary plus on "a" gives you NaN

[Camilo Martinez]

Now try console.log(new Array(4).join(Number('y tho') + 'a')+' Batman!') 🦇

[Sadeedpv🥇]

NaNaNaNaNaNa batman! is that the desired output or am I missing something? 🤔

[Camilo Martinez]

Yes, maybe for people from my generation 😅.

Now I think this joke is too old 👴

[Sadeedpv🥇]

Haha, maybe that joke is from the 'dad joke' era! 😄😄.

[Alex Lohr]

NaN is actually part of IEEE 754, which is used in most languages to express floating point numbers.

[SkyHops]

"baaa"

[Sadeedpv🥇]

Its actually banana, basically the unary plus(++) of 'a' gives NaN which gives us 'baNaNa' and convert it to lowercase => banana

[SkyHops]

Do you need

"use strict" 

at the top of the script 🤔
I used an online Javascript console.

[Sadeedpv🥇]

Try this code :

console.log(("b" + "a" + + "a" + "a").toLowerCase());

[SkyHops]

Thank you; my mistake.
I didn't see the ++.
For my defence on my phone it red:

("b" + "a" +
 + "a" + "a").toLowerCase()

[chrdek]

yep, that' s what it does.

[Chrissy Vinco]

Okay the person who thought of this problem is soooo clever

[Dragon]

JavaScript is really a magical language

[Vladas Saulis]

when it gets to insane questions...

[Khair Alanam]

That's honestly cool.

[Sadeedpv🥇]

and weird

[Bob dnaeil]

Is it bAaa

[codeyStein]

It's the little things that makes javascirpt so annoying :)