isfinite in js geeksforgeeks

June 11, 2026 - The JavaScript isFinite() function is used to check whether a number is a finite, legal number or not. It returns true for all the values except +infinity, -infinity, or NaN.

Python map() function

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geeksforgeeks.org › javascript-number-isfinite-method

JavaScript Number isFinite() Method - GeeksforGeeks

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

GeeksforGeeks

origin.geeksforgeeks.org › javascript › javascript-number-isfinite-method

JavaScript Number isFinite() Method - GeeksforGeeks

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

GeeksforGeeks

geeksforgeeks.org › javascript › underscore-js-_-isfinite-function

Underscore.js _.isFinite() Function - GeeksforGeeks

November 25, 2021 - The _.isFinite() function is used to check whether the value of the parameter passed is finite or not. If the parameter has an infinite value the output is false otherwise, true. We can even perform any operation like addition, subtraction in ...

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geeksforgeeks.org › javascript › lodash-_-isfinite-method

Lodash _.isFinite() Method - GeeksforGeeks

September 4, 2024 - Lodash _.isFinite() method checks whether the given value is a primitive finite number or not and returns the corresponding boolean value. ... This method returns a Boolean value(Returns true if the given value is a finite number, else false).

MDN Web Docs

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › isFinite

isFinite() - JavaScript - MDN Web Docs - Mozilla

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. Because coercion inside the isFinite() function can be surprising, you may prefer to use Number.isFinite().

W3Schools

w3schools.com › jsref › jsref_isfinite.asp

JavaScript isFinite() Method

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

MDN Web Docs

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Number › isFinite

Number.isFinite() - JavaScript - MDN Web Docs

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.

TutorialsPoint

tutorialspoint.com › javascript › javascript_number_isfinite_method.htm

JavaScript Number isFinite() Method

The JavaScript Number isFinite() method is a static method used to determine whether the passed value is a finite number or not. It checks that the given value is a number and returns a boolean value "true" if the passed value is a finite number ...

Reality Ripple

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isFinite() - JavaScript - UDN Web Docs: MDN Backup

If the argument is NaN, positive infinity, or negative infinity, this method returns false; otherwise, it returns true. isFinite(Infinity); // false isFinite(NaN); // false isFinite(-Infinity); // false isFinite(0); // true isFinite(2e64); // true isFinite(910); // true isFinite(null); // true, would've been false with the // more robust Number.isFinite(null) isFinite('0'); // true, would've been false with the // more robust Number.isFinite("0")

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Programiz

programiz.com › javascript › library › built-in › isfinite

JavaScript isFinite()

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

Stack Overflow

stackoverflow.com › questions › 4724555 › how-do-i-check-if-a-number-evaluates-to-infinity

javascript - How do I check if a number evaluates to infinity?

Top answer

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208

if (result == Number.POSITIVE_INFINITY || result == Number.NEGATIVE_INFINITY)
{
    // ...
}

You could possibly use the isFinite function instead, depending on how you want to treat NaN. isFinite returns false if your number is POSITIVE_INFINITY, NEGATIVE_INFINITY or NaN.

if (isFinite(result))
{
    // ...
}

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In ES6, The Number.isFinite() method determines whether the passed value is a finite number.

Number.isFinite(Infinity);  // false
Number.isFinite(NaN);       // false
Number.isFinite(-Infinity); // false

Number.isFinite(0);         // true
Number.isFinite(2e64);      // true

Unibo

lia.disi.unibo.it › materiale › JS › developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › isFinite.html

isFinite() - JavaScript | MDN

If the argument is NaN, positive infinity, or negative infinity, this method returns false; otherwise, it returns true. isFinite(Infinity); // false isFinite(NaN); // false isFinite(-Infinity); // false isFinite(0); // true isFinite(2e64); // true isFinite("0"); // true, would've been false with the // more robust Number.isFinite("0")

DEV Community

dev.to › kobbyowen › javascript-in-depth-isfinite-isnan-functions-cp6

JavaScript In Depth - isFinite & IsNaN Functions - DEV Community

November 1, 2021 - This behavior is so true that, ECMAScript documentation suggests that one of the reliable ways to check for NaN is the expression(x === x), which returns false only if x is a NaN. Mostly, to determine if a number is okay to be used in arithmetic operation without few surprises, you should find yourself using isFinite more than isNaN, since isFinite checks for NaN values and goes on to check for infinite values.

Codecademy

codecademy.com › docs › javascript › number methods › .isfinite()

JavaScript | Number Methods | .isFinite() | Codecademy

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.

W3Schools

w3schools.com › jsref › jsref_isfinite_number.asp

JavaScript Number.isFinite() Method

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

Stack Overflow

stackoverflow.com › questions › 76936527 › what-is-the-difference-between-number-isfinite-and-number-isinteger-in-javas

What is the difference between Number.isFinite() and Number.isInteger() in JavaScript? - Stack Overflow