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:
Javascript
console.log("When zero is passed as a parameter: " + Math.log(0)); |
Output:
When zero is passed as a parameter: -Infinity
Example 2: When “-1” is passed as a parameter.
javascript
console.log("Result: " + Math.log(-1)); |
Output:
Output : NaN
Example 3: When “10” is passed as a parameter.
javascript
console.log("Result : " + Math.log(10)); |
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
console.log("Result : " + Math.log(8)/Math.log(2)); |
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.
