Formatting a number with exactly two decimals in JavaScript

Formatting a number with exactly two decimals in JavaScript

One way to be 100% sure that you get a number with 2 decimals:

(Math.round(num*100)/100).toFixed(2)
If this causes rounding errors, you can use the following as James has explained in his comment:

(Math.round((num * 1000)/10)/100).toFixed(2)