Math.log( ) In JavaScript

The Math.log() function in JavaScript is used to return the natural logarithm (base e) of a number.
The JavaScript Math.log() function is equivalent to ln(x) in mathematics.
If the value of x is negative, then math.log() function return NaN.
log() is a static method of Math, therefore, it is always used as Math.log(), rather than as a method of a Math object created.

Syntax:

Math.log(value)

Parameters Used:
Value:A number whose natural logarithm you want to find.

Return Value:
The Math.log() function returns the natural logarithm given number.

Examples:

1. When zero is passed as a parameter.

   <script type="text/javascript">    document.write("Output : " + Math.log(0)); </script>

   Output:

   Output : -Infinity

2. When “-1” is passed as a parameter.

   <script type="text/javascript">    document.write("Output : " + Math.log(-1)); </script>

   Output:

   Output : NaN

3. When “10” is passed as a parameter.

   <script type="text/javascript">    document.write("Output : " + Math.log(10)); </script>

   Output:

   Output : 2.302585092994046

4. Calculating Math.log() with a different base.
   For finding the logarithm of 8 with base 2,execute the math.log() function in the following way:

   <script type="text/javascript">    document.write("Output : " + Math.log(8)/Math.log(2)); </script>

   Output:

   Output : 3