Why does it not work

Question

I have a problem with this code

Answer 1

link the thingy instead of pasting it into a comment

Answer 2

This is a forum, not a chat. Please don't put each sentence or thought in an individual comment – it just bloats the thread and makes it hard to read.

0 + "1" becomes a string because "1" is a string, so Javascript assumes you want to concatenate strings.

Answer 3

That doesn't make it better.

Answer 4

Sorry... 😅
The use of thingy threw me off.

Answer 5

I made 2 examples, one with the minus, one with the plus button.

https://sololearn.com/compiler-playground/WoT73u5wl4Xn/?ref=app

Answer 6

Do not make 1 a string. Leave it as number.
"1" is a string
1 is a number
Add 1, not "1"

Answer 7

So you need to check first if num1 == null, then concatenate accordingly

Answer 8

So what's the problem?
Do you have new code?

Answer 9

Yes, you can nest as many as you like!

Answer 10

<button onclick="plusOrMinus = false;
window.onload = function(){
document.getElementById('output').innerHTML = 'Ergebnis: ' + plusOrMinus;
};">-</button>

Answer 11

It doesnt display the thingy when i press -

Answer 12

Ihr könnt beide auf Deutsch schreiben 😉

Answer 13

If you want people to press buttons in order to check on thingies, link your code.

I would assume the function definition doesn't work, but the code is pasted in a comment.

People will only put as much effort in answering a question as the person asking puts in posing their question.

Answer 14

https://sololearn.com/compiler-playground/WU47GLa7kn9D/?ref=app

Answer 15

Its not set to public tho

Answer 16

Do i need to?

Answer 17

Now it is

Answer 18

Gifs?

Answer 19

I got another problem

Answer 20

Now im trying to get the calculator logic to work and i create the num1 var as null