Plzz help me in dropdown of html

Question

"You can use any other language if it needs"

I need a type of dropdown in which if I select 1st option then it will change the text inside the dropdown.

Example :

If I made an dropdown with name select.

So 1st I'll click on the select dropdown.
Then it will show 4 options.

let the options are Add, Subtract, Multiply and Divide.

If I select the 1st option i.e Add.

So I want that it will show '+' symbol after selecting Add option in dropdown.
.
.
If u guys understand plzz solve this, if not msg me so that I can explain you more deeply.
https://code.sololearn.com/WG0JOE4V8qNB/?ref=app

Answer 1

You can do it using JavaScript

But it must be clearer what the idea is, and explain it point by point,
What I understood from you now:
Is that you want to create a drop-down selection menu with 4 options, and if you choose the first option, where the name appearing in the drop-down selection menu is (Add) and after choosing it a sign (+) appears

See this example:

https://code.sololearn.com/WA4a4a29A24A

Dropdown list of math symbols

Hope this may help you

Answer 2

Okay where is you code of html part?