Number.MAX_VALUE and Number.MIN_VALUE define the outer bounds of the Number value set : Introdunction : Number Data Type JAVASCRIPT TUTORIALS

Number.MAX_VALUE and Number.MIN_VALUE define the outer bounds of the Number value set

All numbers must fall between Number.MAX_VALUE and Number.MIN_VALUE.

When a calculation results in a number greater than Number.MAX_VALUE, it is assigned a value of Number.POSITIVE_INFINITY.

When a calculation results in a number less than Number.MIN_VALUE, it is assigned a value of Number.NEGATIVE_ INFINITY.

If a calculation returns an infinite value, the result cannot be used in any further calculations.

There is a special value for infinity named Infinity.

Number.POSITIVE_ INFINITY has a value of Infinity.

Number.NEGATIVE_INFINITY has a value of -Infinity.

A method can be used to determine if a number is finite.



var iResult = iNum* some_really_large_number;
if (isFinite(iResult)) {
    alert("Number is finite.");
} else {
    alert("Number is infinite.");
}

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