isFinite

Syntax:: isFinite(testnumber)

The top-level function, isFinite, is used to determine if the argument, testnumber, is a finite and legal number. This function returns true for a finite number and otherwise returns false.

Examples

Code:

document.write(isFinite(2.2345))

Output:

true

Code:

document.write(isFinite(2.5E+345))

Output:

false

Code:

document.write(isFinite("Ima string"))

Output:

false

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Primary links

JavaScript » Functions » isFinite

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