Table of contents
- 1. Summary
- 2. Syntax
- 3. Parameters
- 4. Description
- 5. Examples
- 6. See also
Summary
Evaluates an argument to determine whether it is a finite number.
| Core Global Method | |
|---|---|
| Implemented in | JavaScript ? |
| ECMAScript Edition | ECMAScript ? |
Syntax
isFinite(number)
Parameters
-
number - The number to evaluate.
Description
isFinite is a top-level function and is not associated with any object.
You can use this method to determine whether a number is a finite number. The isFinite method examines the number in its argument. If the argument is NaN, positive infinity or negative infinity, this method returns false, otherwise it returns true.
Examples
Example: Using isFinite
You can check a client input to determine whether it is a finite number.
if (isFinite(ClientInput)) {
/* take specific steps */
}
