isFinite

Checks if a value when converted to a number is finite (not -Infinity, Infinity, or NaN).

Syntax

function isFinite(value)

Parameters

• value

  Any numeric value.

Return value

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

Examples

isFinite(1/0)

false

isFinite(Math.sqrt(-1))

false

isFinite(1)

true

isFinite("1")

true

// Difference from Number.isFinite:
Number.isFinite("1")

false

See also

• Number.isFinite