javascript Unexpected token *

Question

I am trying to get an integer from a JSON and multiply it with a number that has an exponentiation. However, it gives me

let dec = 10 ** _decimals;

SyntaxError: Unexpected token *

The code is the following:

let dec = 10 ** _decimals;
let value = parseInt(req.body.burn_value) * dec;

I can't figure out why it is doing that. What am I doing wrong?

** is not multiplication -> developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Andreas
– Andreas, Commented Mar 28, 2018 at 14:25
You could use Math.pow, for example; Math.pow(10, _decimals) — scagood
– scagood, Commented Mar 28, 2018 at 14:26
Can't see any JSON here, let dec = 10 ** _decimals; looks like JavaScript. — phuzi
– phuzi, Commented Mar 28, 2018 at 14:34

Arnav Borborah · Accepted Answer · 2018-03-28 14:32:34Z

8

Your environment doesn't support the new-ish exponentiation operator. But if you're just trying to multiply it, use * instead:

let dec = 10 * _decimals;

Or if you are trying to use exponentiation:

let dec = Math.pow(10, _decimals);

Arnav Borborah

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answered Mar 28, 2018 at 14:25

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2 Comments

The ** is a 'to the power of' operator, so 10 ** 2 is 100, not 20.

Now your args are the wrong way around in the Math.pow