NEGATIVE_INFINITY in JavaScript

This article will look at the NEGATIVE_INFINITY value in JavaScript.

NEGATIVE_INFINITY in JavaScript

The NEGATIVE_INFINITY in JavaScript is a constant value lower than any other number (it means no other number is lesser than this value). JavaScript displays the NEGATIVE_INFINITY value as -Infinity.

Some conditions where a number is NEGATIVE_INFINITY are mentioned below.

1. Any positive value multiplied by NEGATIVE_INFINITY is NEGATIVE_INFINITY.
2. NEGATIVE_INFINITY divided by any positive value except POSITIVE_INFINITY is NEGATIVE_INFINITY.

Let’s see one example.

function cNumber(sNum) {
  if (sNum === Number.NEGATIVE_INFINITY) {
    return '-Infinity';
  }
  return 'provided number is good';
}

console.log(cNumber(-Number.MAX_VALUE));

Run Code

A function cNumber is created, which takes parameter sNum, and if the sNum is equal to Number.NEGATIVE_INFINITY, it returns -Infinity.

In this program, when we run the code, the if statement doesn’t run because the number is not passed as a parameter and then it returns provided number is good, as you can see in the console by running the above code.

Output:

"provided number is good"

Let’s run the code by providing the number as a parameter and see what it returns.

function cNumber(sNum) {
  if (sNum === Number.NEGATIVE_INFINITY) {
    return '-Infinity';
  }
  return 'provided number is good';
}

console.log(cNumber(-Number.MAX_VALUE * 3));

Run Code

Output:

"-Infinity"