JavaScript: Number.isFinite

By Xah Lee. Date: . Last updated: .
Number.isFinite(number)
  1. If Type of number is not number, return false.
  2. If number is NaN or +Infinity or -Infinity, return false.
  3. Else, return true.
console.log(Number.isFinite(3));
console.log(Number.isFinite(3.4));

console.log(Number.isFinite("3") === false);
console.log(Number.isFinite(Infinity) === false);
console.log(Number.isFinite(NaN) === false);

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