How to create a system that solves subtraction, multiplication, division, and addition using JavaScript?

[KookieYolo]

Good evening! I’m a beginner and I’m learning how to code a program that solves subtraction, multiplication, division, and addition.
Here’s what I have for multiplication.

I have no idea how to create the other operations! Is there anyway to create the programs?

[markbrown4]

Hi @KookieYolo,

Edit your post, select your code and hit the </> button to format code blocks.

var jsRules = "yep";
console.log(jsRules);

[KookieYolo]

Well, I already created a screenshot… I’ll keep what you said in mind!

[markbrown4]

I can see the screenshot now

You might want to add a select for operators:

<select id="operator">
  <option value="-">Subtract</option>
  <option value="+">Add</option>
  <option value="*">Multiply</option>
  <option value="/">Divide</option>
</select>

Using eval is considered bad practice but in this case it might help you with your demo.

function calculate() {
  var operator = document.getElementById('operator').value;
  var value = eval(x.value + operator + y.value);
  d.innerHTML = value;
}

[KookieYolo]

Ah… Ok. I included the operators and they’re going completely haywire, so where do I put the eva1’s and the operators?

[markbrown4]

I’ve edited the post to clear that up.