Second argument to parseFloat in JavaScript?

Question

In this font-size resizing tutorial:

Quick and easy font resizing

the author uses parseFloat with a second argument, which I rea

Answer 1

No, they're getting confused with parseInt(), which can take a radix parameter. parseFloat(), on the other hand, only accepts decimals. It might just be for consistency, as you should always pass a radix parameter to parseInt() because it can treat numbers like 010 as octal, giving 8 rather than the correct 10.

Here's the reference for parseFloat(), versus parseInt().