Why does Math.log(0) return -Infinity in JavaScript?

4 thoughts on “Why does Math.log(0) return -Infinity in JavaScript?”

1. Because log 0 is undefined and so they’ve implemented it that way.

   console.log(Infinity); /* Infinity */

   console.log(Infinity + 1); /* Infinity */

   console.log(Math.pow(10, 1000)); /* Infinity*/

   console.log(Math.log(0)); /* -Infinity */

   console.log(1 / Infinity); /* 0 */

   Specs: https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Infinity#Beispiele

   Reply

2. Fundamentally, because that’s how it’s specified:

   20.2.2.20 Math.log ( x )

   Returns an implementation-dependent approximation to the natural logarithm of x.

   • If x is NaN, the result is NaN.
   • If x is less than 0, the result is NaN.
   • If x is +0 or -0, the result is -∞.
   • If x is 1, the result is +0.
   • If x is +∞, the result is +∞.

   (my emphasis)

   But more to the point, log(x) as x approaches 0 decreases without bound. So -Infinity seems a reasonable choice for the spec to make.

   Reply

3. generic tadalafil canada – http://xtadalafilp.com/ discount tadalafil

   Reply

4. free local dating sites
   plenty of fish dating site of free dating

   Reply