This is a special numeric value representing a value less than Number.MIN_VALUE. This value is represented as "-Infinity". It resembles an infinity in its mathematical behavior. For example, anything multiplied by NEGATIVE_INFINITY is NEGATIVE_INFINITY, and anything divided by NEGATIVE_INFINITY is zero. Because NEGATIVE_INFINITY is a constant, it is a read-only property of Number.
var val = Number.NEGATIVE_INFINITY;
var val = Number.NEGATIVE_INFINITY; console.log("Value of Number.NEGATIVE_INFINITY : " + val );
Value of Number.NEGATIVE_INFINITY: -Infinity.