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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


This article is attributed to GeeksforGeeks.org

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