JavaScript Infinity Property

　JavaScript Global Properties/Function

GlobalInfinityThe property is a numerical value representing infinity.

Infinity represents the numerical value of positive infinity.

-Infinity represents the numerical value of negative infinity.

When the number exceeds the upper limit of floating-point numbers (i.e.1.797693134862315E + 308），will display Infinity.

When the number exceeds the lower limit of floating-point numbers that is-1.797693134862316E + 308When-Infinity.

The initial value of Infinity isNumber.POSITIVE_INFINITY.

Syntax:

Infinity

var x = document.getElementById('result');
x.innerHTML = Infinity;　　　//　Infinity
x.innerHTML = Math.pow(10,　1000);　//　Infinity
x.innerHTML =　1.7976931348623157E+10308;　　//　Infinity
x.innerHTML =　-1.7976931348623157E+10308;　//　Negative Infinity

Browser Compatibility

All browsers fully support the Infinity property:

Technical Details

More Examples

Check if maxNumber is Infinity:

var maxNumber = Math.pow(10,　1000);　//　Maximum Positive Number
if (maxNumber === Infinity) {
　　　document.getElementById('result').innerHTML = "We call it infinity!";
}

　JavaScript Global Properties/Function