I have a function that when the return statement is prefaced with typeof it says it’s a number. But when I remove it it outputs NaN.
I don’t understand why.
Here’s a fiddle:
Thank you.
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I have a function that when the return statement is prefaced with typeof it says it’s a number. But when I remove it it outputs NaN.
I don’t understand why.
Here’s a fiddle:
Thank you.
Trying
alert(typeof NaN)might be illuminating.Although
NaNliterally means “not a number”, it actually is a kind ofnumber. Its meaning is “not a valid number” (in the sense of mathematical numbers), but it is still anumbervalue (in the sense of Javascript types).