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JavaScript Math log() Method

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  • Last Updated : 29 Nov, 2022
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The JavaScript Math log( ) Method is used to return the natural logarithm (base e) of a number. The JavaScript Math.log() method is equivalent to ln(x) in mathematics. If the value of x is negative, then the math.log() method return NaN. The 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: This method accepts a single parameter as mentioned above and described below:

  • value: This parameter holds a number whose natural logarithm you want to find.

Return value: The Math.log() method returns the natural logarithm given number.

Below are examples of the Math log() Method.

Example 1: 

html




<script type="text/javascript">
    console.log("When zero is passed as a parameter: "
                    + Math.log(0));
</script>


Output:

When zero is  passed as a parameter: -Infinity

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

javascript




<script type="text/javascript">
    console.log("Result: " + Math.log(-1));
</script>


Output:

Output : NaN

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

javascript




<script type="text/javascript">
    console.log("Result : " + Math.log(10));
</script>


Output:

Result : 2.302585092994046

Program 3: Calculating Math.log() with a different base. For finding the logarithm of 8 with base 2, execute the math.log() method in the following way: 

javascript




<script type="text/javascript">
    console.log("Result : " + Math.log(8)/Math.log(2));
</script>


Output:

Output : 3

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

Supported Browsers:

  • Google Chrome 1 and above
  • Internet Explorer 3 and above
  • Firefox 1 and above
  • Opera 3 and above
  • Safari 1 and above

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.


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