Where does the "n" come from ?

Question

Here's the code:
('b' + 'a' + + 'a' + 'a').toLowerCase()
The output:
"banana"

Answer 1

I think 'characters' can be represented numerically with ASCII chart ( a = 65, b = 66)

It's not missing a n, it's missing "NaN" which stands for NotANumber

JavaScript couldn't convert the empty char so it prints out NaN.

Without the .toLowerCase method, the output would be

baNaNa

Answer 2

Due to the "+ +a" there two things happening with 'a'. The plus sign that is closest to 'a' is acting like a unary plus operator and is trying to convert 'a' to a number if it can but since 'a' is not a number NaN is returned, which considered a number. The second plus sign will concatenate the NaN with the previous string.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
https://code.sololearn.com/WyZf46u5I92t/#js

Answer 3

But in single quotes it should be threated as string and not as variable and should print undefined or throw an error

update: HNNX your right its threated as number

Answer 4

Ярослав Вернигора (Yaroslav Vernigora)
I found someone tweeted it on twitter with a caption " JavaScript is weird " 😂 ...so i took the code and ran it in the console and it actually printed out " banana "

Answer 5

var x;
x= ('b' + 'a' + + 'a' + 'a').toLowerCase();
console.log(x);

Answer 6

ODLNT Thank you sooo much , i got it 💜💙

Answer 7

ODLNT thank you very much for your efforts! I got it!

Answer 8

Read tutorial most carefully 😁

Answer 9

I really stumbled only here:
+ +a

Answer 10

You are welcome, I'm glad I could contribute to the discussion.

Answer 11

Ярослав Вернигора (Yaroslav Vernigora) it's a bad explanation sorry, - ODLNT explained it better

Answer 12

Heomhkl

Answer 13

Thanks for sharing.

Answer 14

This shouldnt work. Please send your code to show us

Answer 15

Marina from where you get this exersises?

Answer 16

HNNX 🐿 you were right, but I didn't understand anything from your explanation. can you explain it any other way?

Answer 17

On the end its just weird

Answer 18

Bro, you are amazing !
🤣🤣😂😂
Great discovery !!!

Answer 19

Salut

Answer 20

thanks for the help