What is NaN property in JavaScript?

Forums JavaScriptWhat is NaN property in JavaScript?
Staff asked 2 years ago

Answers (1)

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Staff answered 1 year ago
NaN

The value of the global NaN attribute denotes Not-A-Number.

example
function sanitise(x) {
  if (isNaN(x)) {
    return NaN;
  }
  return x;
}

console.log(sanitise('1'));
// expected output: "1"

console.log(sanitise('NotANumber'));
// expected output: NaN

 

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