How to convert a string into a mathematical expression?

Question

I am trying to convert a string into mathematical expression, so I can calculate the value, but when I use the parseInt method it returns NAN:

function cal() {
  const data = '(2 * 3 + 2) * (2 / 2)';
  const info = data.replace(/\s/g, '');
  const output = parseInt(info, 10);
  console.log(output);
}
cal();

Does this answer your question? [Calculate string value in javascript, not using eval](https://stackoverflow.com/questions/6479236/calculate-string-value-in-javascript-not-using-eval) — Karan, Jul 21 '20 at 09:15

score 4 · Answer 1 · answered Jul 21 '20 at 09:06

4

See Javascript eval()

function cal() {
  const data = eval('(2 * 3 + 2) * (2 / 2)');
  const output = parseInt(data, 10);
  console.log(output);
}
cal();

answered Jul 21 '20 at 09:06

Sivakumar Tadisetti

4,865
7
34
56

score 3 · Answer 2 · answered Jul 21 '20 at 09:06

3

You can use eval Example :

const data = '(2 * 3 + 2) * (2 / 2)';

const result = eval(data)

console.log(result)

answered Jul 21 '20 at 09:06

Rilla

505
4
16

How to convert a string into a mathematical expression?

2 Answers2