Advanced mathematical expressions in JavaScript - How to

Question

I am about to do some calculating with JavaScript. How do one write (rather complex) mathematical expressions in JavaScript?

Let's take this as an example, where I use x as a variable:

-2(10^ -10)x^6

Is it possible to write it just like that? Or should I write something like this:

-2 * math.pow(10, -10) * math.pow(x, 6) ?

Thanks!

if you are interested in using that notation for readability look at: http://mathjs.org/ which allows for an eval call on this type of notation. — Cristian Cavalli, May 30 '15 at 20:22

Bob · Answer 1 · 2015-05-30T20:30:19.287

0

The second way is correct. (but require capital m eg Math)

In JavaScript ^ is XOR and * is required for multiplication.

edited May 30 '15 at 20:30

answered May 30 '15 at 20:19

Bob

1

Tried it that way again, but it did nor work. I found the problem though! A upper case "M" is required! So "Math.pow(10, -10)", not "math.pow(10, -10)" – JakeTheSnake May 30 '15 at 20:26
Easy to miss little mistakes like those when you assume something is correct. Glad you figured it out. – Bob May 30 '15 at 20:31

score 0 · Answer 2 · answered May 30 '15 at 20:27

-2(10^ -10)x^6

The above statement will never work. It will give you an unexpected identifier because of )x and 2 is not a function because of -2(..

-2 * math.pow(10, -10) * math.pow(x, 6)

This will also won't work as its Math and not math as Javascript is case-sensitive.

Proper way is

-2 * Math.pow(10, -10) * Math.pow(x, 6)

2 Answers2