July 8, 2025 - The isFinite() function determines whether a value is finite, first converting the value to a number if necessary. A finite number is one that's not NaN or ±Infinity.

cssText getPropertyPriority() getPropertyValue() item() length parentRule removeProperty() setProperty() JS Conversion ... The isFinite() method returns true if a value is a finite number.

The isFinite() function checks whether the passed value is a finite number.

July 10, 2025 - The Number.isFinite() static method determines whether the passed value is a finite number — that is, it checks that a given value is a number, and the number is neither positive Infinity, negative Infinity, nor NaN.

To test if all entries of an Array or Matrix are finite, use isBounded. ... math.isFinite(0) // returns true math.isFinite(NaN) // returns false math.isFinite(math.bignumber(Infinity)) // returns false math.isFinite(math.fraction(1,3)) // returns true math.isFinite(math.complex('2 - 4i')) // ...

December 9, 2024 - Here, filter utilizes isFinite() to keep only the elements that are finite numbers from the data array, effectively cleaning the data.

The **`isFinite()`** function determines whether a value is finite, first converting the value to a number if necessary. A finite number is one that's not {{jsxref("NaN")}} or ±{{jsxref("Infinity")}}. Because coercion inside the `isFinite()` ...

The isFinite() method returns true if the value is an infinite number.

June 11, 2026 - The JavaScript isFinite() function is used to check whether a number is a finite, legal number or not.

October 13, 2021 - The above example passes an Infinity, a NaN, and an integer value, into the Number.isFinite() method to verify if each value is finite or not.

The global isFinite() function determines whether the passed value is a finite number.

January 13, 2026 - The global isFinite() includes type coercion overhead, which may impact performance in tight loops processing large datasets: // Benchmark comparison const testData = Array.from({ length: 1000000 }, () => Math.random() * 100); console.time('isFinite'); testData.forEach(num => isFinite(num)); console.timeEnd('isFinite'); console.time('Number.isFinite'); testData.forEach(num => Number.isFinite(num)); console.timeEnd('Number.isFinite'); // Number.isFinite is typically 2-3x faster when working with actual numbers ·

JavaScript's isFinite() function can be used to ensure that a numerical value is indeed finite, or not equal to Infinity. The script below multiplies the MAX_VALUE property by two, and checks if the result is finite.

cssText getPropertyPriority() getPropertyValue() item() length parentRule removeProperty() setProperty() JS Conversion ... The Number.isFinite() method returns true if a number is a finite number.

August 8, 2023 - The Number.isfinite() method in JavaScript is used to check whether the passed value is a finite number or not.

The global isFinite() function determines whether the passed value is a finite number. If needed, the parameter is first converted to a number.

The **`Number.isFinite()`** static method determines whether the passed value is a finite number — that is, it checks that a given value is a number, and the number is neither positive {{jsxref("Infinity")}}, negative `Infinity`, nor ...

@VLAZ I can see that it is returning true, hence the last test case is returning an array with the numbers which were a string inside the array. I'm wondering why it isn't false, assuming it is a string just like 'aasf'. I can't see any clarification about that in the docs. ... Actually, isFinite() determine if a value is finite, and convert it to int or float if is necessary with parseInt or parseFloat, if u try parseInt with '123' the result will be 123 number but if u try with 'adf' for example the result will be NaN (Not a Number).

The isFinite function checks if a parameter is a finite number (that is, not a string, array, etc., and not plus or minus infinity).

August 26, 2020 - ➜ es git:(master) ✗ node app false false false true true false false ➜ es git:(master) ✗ · It returns true if passed value is a finite number. Anything else, booleans, strings, objects, arrays, returns false.