Question:
Why does my if statement
if (final == "NaN") { window.alert("You...are...a...dunce. Hit reload to try again.");}fail to detect when final is “NaN”? It always goes straight on to the else part, and then comes back with the answer “Required Percentage: NaN%.”
Answer:
If you put “NaN” in quotes like that, it thinks that you’re trying to compare final to a string. You can’t compare anything to Nan directly; instead, you need to use the built-in isNan() function.
What you want to do is instead say:
if (isNan(final)) {...
