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Version: 3.27.2

Number.NEGATIVE_INFINITY

The Number.NEGATIVE_INFINITY property represents the negative Infinity value.

Value​

The same as the negative value of the global Infinity property.

Description​

The Number.NEGATIVE_INFINITY value behaves slightly differently than mathematical infinity:

  • Any positive value, including Number.POSITIVE_INFINITY, multiplied by Number.NEGATIVE_INFINITY is Number.NEGATIVE_INFINITY.
  • Any negative value, including Number.NEGATIVE_INFINITY, multiplied by Number.NEGATIVE_INFINITY is Number.POSITIVE_INFINITY.
  • Any positive value divided by Number.NEGATIVE_INFINITY is negative zero (as defined in IEEE 754).
  • Any negative value divided by Number.NEGATIVE_INFINITY is positive zero (as defined in IEEE 754).
  • Zero multiplied by Number.NEGATIVE_INFINITY is NaN.
  • NaN multiplied by Number.NEGATIVE_INFINITY is NaN.
  • Number.NEGATIVE_INFINITY, divided by any negative value except Number.NEGATIVE_INFINITY, is Number.POSITIVE_INFINITY.
  • Number.NEGATIVE_INFINITY, divided by any positive value except Number.POSITIVE_INFINITY, is Number.NEGATIVE_INFINITY.
  • Number.NEGATIVE_INFINITY, divided by either Number.NEGATIVE_INFINITY or Number.POSITIVE_INFINITY, is NaN.
  • x > Number.NEGATIVE_INFINITY is true for any number x that isn't Number.NEGATIVE_INFINITY.

You might use the Number.NEGATIVE_INFINITY property to indicate an error condition that returns a finite number in case of success. Note, however, that NaN would be more appropriate in such a case.

Because Number.NEGATIVE_INFINITY is a static property of Number, you always use it as Number.NEGATIVE_INFINITY, rather than as a property of a number value.