Number.isFinite

Checks if a number is finite (that is, it’s a number that is not -Infinity, Infinity, or NaN).

Syntax

isFinite(number)

Parameters

• number

  A number value.

Return value

Returns true if the number is finite, false if it’s -Infinity, Infinity, or NaN.

Examples

Number.isFinite(1/0)

false

Number.isFinite(Math.sqrt(-1))

false

Number.isFinite(1)

true

Number.isFinite("1")

false

// Difference from the global isFinite:
isFinite("1")

true

See also

• isFinite