What is the code behind "(" and ")"

Question

In programming a scientific calculator, what is the code behind the brackets button so that the code inside the brackets can be executed first?

https://code.sololearn.com/WL79pjz3ike3/?ref=app

Answer 1

Probably because the calculator on your phone does not just consist of one eval. It can probably be resolved with regular expressions

Answer 2

Why would it be the same?

Answer 3

Airree, I've never studied anything science before neither am I a professional in coding, I'm a business student and its the passion I have for coding that is helping me progress

Answer 4

I was expecting 4 but it outputs an error

Answer 5

Well, that's because the input is invalid. That is pretty obvious, I thought you would know that. But you can still catch the error though

Answer 6

So how can this be fixed?

Answer 7

try {
calMo.value = eval(calMo.value);
} catch (e) {
calMo.value = "Invalid input!";
}

Seriously, you don't know this?

Answer 8

Because 2(2 is the same as 2*2 @~ swim ~

Answer 9

~ swim ~ in Mathematical language
Airree it would be the same because "2(2" is also the same as 2x(2 🤷‍♂️

Answer 10

Well, I have never heard of that. Maybe you could do it with regular expressions, but I don't think you need multiple possibilities for multiplication in a simple calculator.

Answer 11

~ swim ~ Yes, I heard of that, but I was talking about 2(2.

Answer 12

~ swim ~, I am talking about a(2+3) = a*5

Answer 13

Airree, The calculator preinstalled on my phone which I use gives an output of 4 whenever I type 2(2 or 10 when I type 2(2+3 without even closing the brackets

Answer 14

You start evaluating from there first. But I don't get why you are asking this, since it works perfectly. eval does that by default

Answer 15

Airree it doesn't. Why don't you try this on the calculator and see what it outputs "2(2"

Answer 16

So how is it possible that the calculator on my phone does not produce an error 🤔

Answer 17

I'll post a picture of how the calculator preinstalled on my new phone does it without producing an error and I'll tag you to the post

Answer 18

~ swim ~ that's exactly what I'm talking about, now we're on the same page. So what I'm asking is how do I write a program for those brackets in my code?

Answer 19

Or Airree maybe you can help me with the question plizzzzz

Answer 20

Airree Wait a minute, what are regular expressions?