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Colin Grubbs2,137 Points
Does isNaN change the value of the variable to NaN?
When I build the message variable and write the message to the doc when the "not a number" test fails, I notice it changed the input you provide to "NaN" onto the web page. Does this have to do with the parseFloat method?
No, isNaN is only a test function, it is not transformative.
I'd have to see your actual code to analyze the situation further...
This might address the parseFloat part of your question, though:
(See what happens to var g)
I hope that helps.
Stay safe and happy coding!