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

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

The isFinite() function determines whether a number is a finite, legal number. This function returns false if the value is +infinity, -infinity, or NaN (Not-a-Number), otherwise it returns true. ... Color Converter Google Maps Animated Buttons Modal Boxes Modal Images Tooltips Loaders JS Animations ...

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cssText getPropertyPriority() getPropertyValue() item() length parentRule removeProperty() setProperty() JS Conversion ... Number.isFinite(123) //true Number.isFinite(-1.23) //true Number.isFinite(5-2) //true Number.isFinite(0) //true Number.isFinite('123') //false Number.isFinite('Hello') //false Number.isFinite('2005/12/12') //false Number.isFinite(Infinity) //false Number.isFinite(-Infinity) //false Number.isFinite(0 / 0) //false Try it Yourself »

July 10, 2025 - isFinite("0"); // true; coerced to number 0 Number.isFinite("0"); // false isFinite(null); // true; coerced to number 0 Number.isFinite(null); // false

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constructor getDate() getDay() getFullYear() getHours() getMilliseconds() getMinutes() getMonth() getSeconds() getTime() getTimezoneOffset() getUTCDate() getUTCDay() getUTCFullYear() getUTCHours() getUTCMilliseconds() getUTCMinutes() getUTCMonth() getUTCSeconds() now() parse() prototype setDate() setFullYear() setHours() setMilliseconds() setMinutes() setMonth() setSeconds() setTime() setUTCDate() setUTCFullYear() setUTCHours() setUTCMilliseconds() setUTCMinutes() setUTCMonth() setUTCSeconds() toDateString() toISOString() toJSON() toLocaleDateString() toLocaleTimeString() toLocaleString() toString() toTimeString() toUTCString() UTC() valueOf() JS Error ... decodeURI() decodeURIComponent() encodeURI() encodeURIComponent() escape() eval() Infinity isFinite() isNaN() NaN Number() parseFloat() parseInt() String() undefined unescape() JS JSON

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.

abs() acos() acosh() asin() asinh() atan() atan2() atanh() cbrt() ceil() clz32() cos() cosh() E exp() expm1() f16round() floor() fround() LN2 LN10 log() log10() log1p() log2() LOG2E LOG10E max() min() PI pow() random() round() sign() sin() sinh() sqrt() SQRT1_2 SQRT2 tan() tanh() trunc() JS Numbers · constructor EPSILON isFinite() isInteger() isNaN() isSafeInteger() MAX_SAFE_INTEGER MIN_SAFE_INTEGER MAX_VALUE MIN_VALUE NaN NEGATIVE_INFINITY POSITIVE_INFINITY parseFloat() parseInt() prototype toExponential() toFixed() toLocaleString() toPrecision() toString() valueOf() JS Objects ·

The global isFinite() function converts the tested value to a Number, then tests it.

isFinite() returns false if a value is Infinity, -Infinity, or NaN, otherwise true.

June 11, 2026 - <script> console.log(isFinite(12)); console.log(isFinite(0)); console.log(isFinite(12.3)); console.log(isFinite("Geeks")); console.log(isFinite("456")); console.log(isFinite(-46)); </script>

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

March 15, 2026 - The isFinite() function accepts a value and determines whether the given value is a finite number or not. If so, this method returns true, else it returns false.

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()` ...

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.

// check if 100 is a finite number console.log(isFinite(100)); // Output: true // check if NaN is a finite number console.log(isFinite(NaN)); // Output: false

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 ...