Core JavaScript 1.5 Reference:Global Functions:isFinite
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[edit] Summary
Core Function
Evaluates an argument to determine whether it is a finite number.
[edit] Syntax
isFinite(number)
[edit] Parameters
-
number - The number to evaluate.
[edit] 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.
[edit] Examples
[edit] Example: Using isFinite
You can check a client input to determine whether it is a finite number.
if (isFinite(ClientInput)) {
/* take specific steps */
}