Infinity Constant (JavaScript)

A number that is larger than the largest floating point number. Returns an initial value of Number.POSITIVE_INFINITY. Negative Infinity (-Infinity) is smaller than the smallest floating point number.




The Infinity constant is a member of the Global object, and is made available when the scripting engine is initialized.


The Infinity property was introduced in Internet Explorer before Internet Explorer 6 and was made read-only in Internet Explorer 9 standards mode.

Applies To: Global Object

See Also

Number Constants